Physiology Quiz Chapter 5

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1. The Central Nervous System consists of the brain and spinal cord.

Explanation

The Central Nervous System (CNS) is composed of the brain and spinal cord. It is responsible for processing and coordinating information received from the sensory organs and sending out instructions to the rest of the body. The brain is the control center of the CNS, while the spinal cord serves as a communication pathway between the brain and the body. Therefore, the statement that the CNS consists of the brain and spinal cord is true.

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About This Quiz
Sensory Organs Quizzes & Trivia

It’s time to learn a little bit about our bodies, wouldn’t you say? The study of physiology allows us to do just that, providing us with information regarding... see morenot only our various body parts and what their functions are, but the same for every organism we come across. Think you know about some of these functions? Take the following quiz to find out for sure! Good luck! see less

2. Generate and conduct nerve impulses away from the cell body

Explanation

Axons are long, slender extensions of nerve cells that transmit electrical impulses away from the cell body to other neurons, muscles, or glands. They are responsible for carrying information from one part of the body to another, allowing for communication between different regions. Axons are covered by a fatty substance called myelin, which helps to insulate and speed up the transmission of the impulses. Overall, axons play a crucial role in the functioning of the nervous system by transmitting signals and coordinating various bodily functions.

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3. The neurotransmitter will either excite or inhibit the post-synaptic neuron or effector cell

Explanation

The statement is true because neurotransmitters are chemical messengers that transmit signals between neurons or from neurons to effector cells. When a neurotransmitter is released into the synapse, it can either excite or inhibit the post-synaptic neuron or effector cell. Excitatory neurotransmitters increase the likelihood of an action potential being generated, while inhibitory neurotransmitters decrease the likelihood. Therefore, the statement accurately describes the effects of neurotransmitters on the post-synaptic neuron or effector cell.

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4. The autonomic nervous system are nerve fibers that control the activity of smooth muscles, cardiac muscles, and glands.

Explanation

The autonomic nervous system is responsible for regulating involuntary bodily functions such as heart rate, digestion, and glandular secretion. It consists of nerve fibers that control the activity of smooth muscles, cardiac muscles, and glands. Therefore, the statement that the autonomic nervous system controls the activity of these muscles and glands is true.

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5. ______________ nerves carry information to and from the spinal cord

Explanation

Spinal nerves carry information to and from the spinal cord. The spinal cord is a long, tubular bundle of nerves that runs within the spine. It is responsible for transmitting signals between the brain and the rest of the body. The spinal nerves emerge from the spinal cord and branch out to various parts of the body, allowing for communication and coordination of sensory and motor functions. Therefore, the correct answer is "Spinal."

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6. Range in length from a few millimeters to more than one meter

Explanation

An axon is a long, slender projection of a nerve cell that conducts electrical impulses away from the cell body. Axons can vary in length, ranging from a few millimeters to more than one meter.

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7. Neurons are highly excitable and when they are stimulated they produced an electrical impulse. This nerve impulse is conducted down the length of the axon

Explanation

Neurons are indeed highly excitable and produce electrical impulses when stimulated. These impulses, also known as nerve impulses or action potentials, are generated in response to changes in the neuron's membrane potential. Once initiated, the impulse is conducted down the length of the axon, allowing for communication between neurons and the transmission of signals throughout the nervous system.

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8. _____________ are nerve fibers which carry information from the visceral organs to the CNS. (inside body information)

Explanation

Visceral afferents are nerve fibers that transmit information from the internal organs to the central nervous system (CNS). These fibers carry sensory signals from organs such as the heart, lungs, and digestive system to the brain and spinal cord. This information is crucial for the CNS to regulate and coordinate the body's internal processes. Somatic afferents, on the other hand, carry sensory information from the skin, muscles, and joints to the CNS. Therefore, the correct answer is visceral afferents as they specifically refer to the nerve fibers responsible for transmitting information from the visceral organs to the CNS.

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9. Myelin sheaths are formed by ____________ cells in the PNS. 

Explanation

Schwann cells are responsible for forming myelin sheaths in the peripheral nervous system (PNS). Myelin sheaths are protective coverings that surround and insulate nerve fibers, allowing for faster and more efficient transmission of electrical impulses. Schwann cells wrap around the nerve fibers, forming multiple layers of myelin that make up the myelin sheath. This insulation is crucial for the proper functioning of the nervous system and ensures the smooth transmission of signals between the brain, spinal cord, and the rest of the body.

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10. Carry nerve impulses away from the CNS only

Explanation

Motor nerves are responsible for carrying nerve impulses away from the central nervous system (CNS) to the muscles and glands, allowing for movement and coordination. These nerves transmit signals from the brain and spinal cord to the muscles, enabling voluntary and involuntary muscle contractions. Unlike sensory nerves, which carry impulses towards the CNS, motor nerves exclusively carry impulses away from the CNS. Mixed nerves, on the other hand, contain both sensory and motor fibers, allowing for bidirectional transmission of signals.

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11. The Nervous System is divided into two parts. They are called:

Explanation

The correct answer is "Peripheral Nervous System and Central Nervous System". The nervous system is divided into two main parts: the peripheral nervous system (PNS) and the central nervous system (CNS). The PNS consists of all the nerves outside of the brain and spinal cord, including sensory and motor nerves. It helps transmit information between the CNS and the rest of the body. On the other hand, the CNS includes the brain and spinal cord, which process and interpret information received from the PNS and control body functions.

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12. An increase in the membrane potential or the membrane potential becomes more negative

Explanation

Hyperpolarization is the correct answer because it refers to an increase in the membrane potential or the membrane potential becoming more negative. This means that the inside of the cell becomes more negative compared to the outside, making it less likely for an action potential to occur. Hyperpolarization can be caused by the opening of potassium channels, which allows potassium ions to leave the cell, or by the influx of chloride ions into the cell. Overall, hyperpolarization leads to a decrease in excitability and a decrease in the likelihood of an action potential being generated.

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13. The Peripheral Nervous System is an information channel which links the body parts with the Central Nervous System

Explanation

The explanation for the given correct answer is that the Peripheral Nervous System serves as a communication network between the body's various parts and the Central Nervous System. It consists of nerves that extend from the brain and spinal cord to the rest of the body, allowing for the transmission of signals and information. This system plays a crucial role in coordinating movement, transmitting sensory information, and regulating bodily functions.

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14. The somatic nervous system are nerve fibers that carry impulses from the CNS to the skeletal muscles.

Explanation

The somatic nervous system is responsible for controlling voluntary movements of the skeletal muscles. It consists of nerve fibers that carry signals from the central nervous system (CNS) to the skeletal muscles, allowing us to consciously control our movements. This system plays a crucial role in activities such as walking, running, and lifting objects. Therefore, the statement "The somatic nervous system are nerve fibers that carry impulses from the CNS to the skeletal muscles" is true.

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15. A whitish, fatty segmented covering over the axon of neurons

Explanation

The myelin sheath is a whitish, fatty segmented covering that surrounds the axon of neurons. It acts as an insulating layer, allowing for faster transmission of electrical signals along the axon. The myelin sheath is formed by specialized cells called oligodendrocytes in the central nervous system and Schwann cells in the peripheral nervous system. This protective covering is crucial for the proper functioning of the nervous system and helps to enhance the efficiency of nerve signal conduction.

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16. Schwann cells are seperated from one another by ________. These are gaps between the Schwann cells.

Explanation

Schwann cells are separated from one another by nodes of Ranvier. These nodes are gaps between the Schwann cells.

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17. Changes in membrane potential act as communication signals which are used to send information. Changes in membrane potential can be negative or positive in respect to the resting membrane potential.

Explanation

Changes in membrane potential can indeed act as communication signals. Neurons, for example, use changes in membrane potential to transmit electrical signals, known as action potentials, which allow for the transmission of information throughout the nervous system. These changes can be either negative (hyperpolarization) or positive (depolarization) in relation to the resting membrane potential, depending on the specific circumstances and stimuli. Therefore, the statement is true.

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18. The Autonomic Nervous system is also known as

Explanation

The Autonomic Nervous System is responsible for controlling the involuntary functions of the body, such as heart rate, digestion, and breathing. It operates without conscious control and regulates these bodily processes automatically. Therefore, it is commonly referred to as the involuntary nervous system.

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19. Neurons that transmit nerve impulses from the CNS to the effector organs (muscles or glands)

Explanation

Motor or efferent neurons are responsible for transmitting nerve impulses from the central nervous system (CNS) to the effector organs, which can be muscles or glands. These neurons carry signals that initiate and control movement or response in the body. Unlike sensory or afferent neurons that carry signals from sensory organs to the CNS, motor neurons transmit signals in the opposite direction, allowing the CNS to control and coordinate the body's actions.

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20. A nerve cell that transmits nerve impulses from one part of the body to another

Explanation

A neuron is a specialized type of cell that is responsible for transmitting nerve impulses from one part of the body to another. It is the basic building block of the nervous system and plays a crucial role in allowing communication between different parts of the body. Neurons have a unique structure with dendrites that receive signals, an axon that transmits signals, and synapses that allow for communication with other neurons. Through this process, neurons enable the transmission of information and coordination of various bodily functions.

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21. A cone-shaped region of the cell body

Explanation

The axon hillock is a cone-shaped region of the cell body where the axon originates. It is located between the cell body and the axon and plays a crucial role in the generation of action potentials. The axon hillock contains a high concentration of voltage-gated ion channels, which are responsible for the initiation and propagation of electrical signals along the axon. This region acts as a trigger zone, where the integration of incoming signals from the dendrites occurs. Once the electrical signals reach a certain threshold at the axon hillock, an action potential is generated and propagated down the axon.

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22. Nerves that transmit nerve impulses from sensory receptors toward the CNS. 

Explanation

Sensory or afferent neurons are responsible for transmitting nerve impulses from sensory receptors towards the central nervous system (CNS). These neurons play a crucial role in allowing us to perceive and respond to various stimuli from our environment. They transmit information about touch, temperature, pain, and other sensory inputs to the CNS, where it is processed and interpreted. This allows us to become aware of our surroundings and initiate appropriate motor responses. Motor or efferent neurons, on the other hand, transmit nerve impulses from the CNS to muscles and glands, enabling us to carry out voluntary and involuntary movements.

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23. Carry nerve impulses toward the CNS only

Explanation

Sensory nerves are responsible for carrying nerve impulses from the body's sensory organs, such as the eyes, ears, and skin, towards the central nervous system (CNS). These nerves transmit information about sensations such as touch, temperature, pain, and pressure to the brain and spinal cord, allowing us to perceive and respond to our environment. Unlike motor nerves, which carry impulses away from the CNS to control muscles and glands, sensory nerves only transmit information towards the CNS. Mixed nerves, on the other hand, contain both sensory and motor fibers, carrying impulses in both directions.

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24. ____________ is the integration and command centers of the nervous system.

Explanation

The central nervous system is responsible for integrating and coordinating the activities of the entire nervous system. It consists of the brain and spinal cord, which receive and process information from the peripheral nervous system and send out commands to the body. The central nervous system plays a crucial role in regulating and controlling bodily functions, as well as processing sensory information and generating responses.

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25. Cells in the peripheral nervous system that surround and cover nerve fibers

Explanation

Schwann cells are a type of cells in the peripheral nervous system that surround and cover nerve fibers. They play a crucial role in providing support and insulation to nerve fibers, aiding in the transmission of nerve impulses. Schwann cells also help in the regeneration of damaged nerves. Therefore, Schwann cells are the correct answer in this context.

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26. In the CNS where there are dense concentrations of myelinated nerve fiber. This is called the __________

Explanation

White matter refers to the regions of the central nervous system (CNS) that contain a high concentration of myelinated nerve fibers. Myelinated fibers appear white due to the presence of the myelin sheath, which helps to speed up the transmission of nerve impulses. In contrast, gray matter consists of neuronal cell bodies, dendrites, and unmyelinated axons. Therefore, the correct answer is white matter.

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27. Are unipolar neurons whose cell bodies are in the sensory ganglia outside of the spinal cord. The unipolar neuron receives the nerve impulse at the dendrite and the axon which maybe very long and myelinated carries the impulse to and away from the cell body. The dendrite, itself, may be a sensory receptor.

Explanation

The given correct answer is "Sensory or afferent neurons." This is because the description provided in the question matches the characteristics of sensory or afferent neurons. These neurons have unipolar morphology, with their cell bodies located in sensory ganglia outside of the spinal cord. They receive nerve impulses at their dendrites and transmit them through their long, myelinated axons to and away from the cell body. Additionally, the dendrite of a sensory neuron may serve as a sensory receptor, further supporting the classification of these neurons as sensory or afferent.

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28. Contain both sensory and motor fiber which transmits impulses to and from the CNS

Explanation

Mixed nerves contain both sensory and motor fibers, allowing them to transmit impulses to and from the central nervous system (CNS). This means that they can carry sensory information from the body to the CNS, such as touch or pain sensations, and also transmit motor signals from the CNS to the muscles or glands, enabling movement or other responses. Mixed nerves are crucial for the integration and coordination of sensory and motor functions in the body.

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29. A neuron has a potential different between the inside and outside of the cell. This potential difference is seen as a ________ across the cell membrane which is call the resting membrane potential.

Explanation

The potential difference between the inside and outside of a neuron is referred to as voltage. This voltage is observed as a difference in electrical charge across the cell membrane, which is known as the resting membrane potential.

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30. Most neurons release one type of neurotransmitter, but some neurons may release more than one neurotransmitter.

Explanation

This statement is true because while most neurons release only one type of neurotransmitter, there are some neurons that are capable of releasing more than one neurotransmitter. These neurons are known as co-transmitters or multi-transmitters. The ability to release multiple neurotransmitters allows for more complex and diverse signaling within the nervous system.

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31. Protects and insulates the axon and increases the speed of nerve impulses

Explanation

Myelin is a substance that protects and insulates the axon, which is the long, slender part of a nerve cell. It acts as an electrical insulator, allowing nerve impulses to travel more efficiently along the axon. The presence of myelin greatly increases the speed at which nerve impulses can be transmitted, enabling faster communication between different parts of the nervous system.

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32. A reduction in the membrane potential or the inside of the membrane becomes less negative (approaches zero)

Explanation

Depolarization refers to a reduction in the membrane potential or the inside of the membrane becoming less negative. This occurs when there is an influx of positive ions into the cell or an efflux of negative ions. As a result, the membrane potential approaches zero or becomes less negative. Therefore, depolarization is the correct answer in this context.

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33. _____________ nerves carry information to and from the brain

Explanation

Cranial nerves carry information to and from the brain. These nerves originate from the brain and extend to various parts of the head and neck. They are responsible for controlling sensory and motor functions in the face, head, and neck regions. The cranial nerves play a vital role in transmitting information related to vision, hearing, taste, smell, and facial movements to the brain, as well as controlling muscles involved in chewing, swallowing, and speaking.

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34. _____________ are nonexcitable cells that surround neurons forming the scaffolding of the nervous tissue

Explanation

Supporting cells are nonexcitable cells that surround neurons and provide structural support and protection to the nervous tissue. They form the scaffolding of the nervous system, helping to maintain the shape and organization of neurons. These cells also play important roles in regulating the chemical environment around neurons and assisting in their proper functioning. While dendrites are part of neurons and bacteria are unrelated to the nervous tissue, supporting cells are specifically responsible for providing support and maintaining the integrity of the nervous system.

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35. Perikaryon is another name for

Explanation

Perikaryon is another term used to refer to the cell body. The cell body, also known as the soma, is the main part of a neuron that contains the nucleus and other organelles essential for the cell's functioning. It is responsible for maintaining the overall health and metabolism of the neuron, as well as integrating and processing incoming signals from dendrites before transmitting them to the axon. Therefore, perikaryon and cell body are interchangeable terms used to describe this crucial component of a neuron.

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36. ___________ are nerve fibers that conduct sensory information from peripheral sensory receptors to the CNS

Explanation

The correct answer is the sensory or afferent division. This division of nerve fibers carries sensory information from peripheral sensory receptors to the central nervous system (CNS). These sensory fibers transmit signals related to touch, temperature, pain, and other sensory stimuli from various parts of the body to the brain and spinal cord for processing and interpretation.

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37. The ________________ (two words) generates nerve impulses and the axon conducts the impulse to the axon terminals

Explanation

The axon hillock is the region of a neuron where nerve impulses are generated. It acts as a trigger zone for the initiation of action potentials. Once the impulse is generated, it is conducted along the axon, which is the long, slender projection of the neuron, to the axon terminals. The axon terminals are responsible for transmitting the impulse to other neurons or target cells. Therefore, the axon hillock and axon work together to generate and transmit nerve impulses within the nervous system.

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38. Star shaped cells that are found in the CNS and they make up about 50% of nervous tissue volume

Explanation

Astrocytes are star-shaped cells that are found in the central nervous system (CNS) and make up about 50% of the nervous tissue volume. They provide structural and metabolic support to neurons, regulate the extracellular environment, and help maintain the blood-brain barrier. Astrocytes also play a role in synaptic transmission and modulate neuronal activity. Due to their diverse functions, astrocytes are essential for the proper functioning of the CNS.

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39. The junction where information is passed from one neuron to another neuron or from an neuron to an effector cell

Explanation

A synapse is the junction where information is passed from one neuron to another neuron or from a neuron to an effector cell. It is a small gap between the axon terminal of one neuron and the dendrite or cell body of another neuron or an effector cell. Neurotransmitters are released from the axon terminal into the synapse and bind to receptors on the dendrite or cell body, allowing the transmission of signals. This allows for communication and coordination between neurons and the transmission of signals throughout the nervous system.

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40. The somatic nervous system is also known as

Explanation

The somatic nervous system is responsible for the voluntary control of skeletal muscles and the reception of external stimuli. It allows us to consciously move our muscles and respond to sensory information from our environment. This system is under our conscious control, enabling us to make deliberate movements and actions. Therefore, the term "voluntary nervous system" accurately describes the somatic nervous system.

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41. Type of receptor for deep pressure

Explanation

Pacinian corpuscles are the type of receptor responsible for sensing deep pressure. These specialized nerve endings are found in the skin and other tissues, particularly in areas where deep pressure is applied. They are highly sensitive to changes in pressure and are able to detect vibrations and rapid changes in pressure, making them well-suited for sensing deep pressure. Pacinian corpuscles consist of a nerve ending surrounded by layers of connective tissue, which allows them to detect and transmit signals related to deep pressure to the brain.

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42. Short, thick, branching cytoplasmic extensions which act as receptive sites. Receive nerve impulses and conduct them toward the cell body.

Explanation

Dendrites are short, thick, branching cytoplasmic extensions that act as receptive sites. They receive nerve impulses and conduct them toward the cell body.

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43. Produce the cerebrospinal fluid (CSF) that fills the central cavities of the brain and spinal cord. Their cilia circulate the CSF.

Explanation

Ependymal cells are responsible for producing cerebrospinal fluid (CSF) and circulating it through the central cavities of the brain and spinal cord. They have cilia that help in the movement and circulation of the CSF. Schwann cells are responsible for producing myelin in the peripheral nervous system, satellite cells provide support and protection to neurons in the peripheral nervous system, and oligodendrocytes produce myelin in the central nervous system. Therefore, the correct answer is ependymal cells.

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44. Myelin sheaths in the CNS are formed by _____________ where one can form 60 different myelin sheaths on different axons at the same time. There are also nodes of Renvier between the _________ myelin sheaths.

Explanation

Oligodendrocytes are responsible for forming myelin sheaths in the central nervous system (CNS). These cells can form up to 60 different myelin sheaths on different axons simultaneously. Additionally, there are nodes of Renvier between these myelin sheaths.

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45. ______________ nerve fibers from the skin, muscle, or joint that carry sensory information to CNS (outside body information)

Explanation

Somatic afferents are nerve fibers that carry sensory information from the skin, muscle, or joint to the central nervous system (CNS). This means that they transmit information about sensations such as touch, pain, temperature, and proprioception from the external environment to the brain and spinal cord. Visceral afferents, on the other hand, carry sensory information from the internal organs to the CNS. Therefore, the correct answer is somatic afferents because they specifically refer to the nerve fibers that carry sensory information from the skin, muscle, or joint.

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46. The somatic nervous system are nerve fibers that control the activity of smooth muscles, cardiac muscles, and glands.

Explanation

The statement is false because the somatic nervous system is responsible for controlling voluntary movements of skeletal muscles, not smooth muscles, cardiac muscles, and glands. The autonomic nervous system, on the other hand, controls the activity of smooth muscles, cardiac muscles, and glands.

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47. Multipolar neurons whose cell bodies are in the CNS

Explanation

Motor or efferent neurons are responsible for carrying signals from the central nervous system (CNS) to the muscles and glands in the body, causing them to respond. These neurons have cell bodies located in the CNS and long axons that extend out to the target organs. This allows them to transmit signals and initiate movement or other responses. In contrast, sensory or afferent neurons carry signals from sensory receptors to the CNS, providing information about the external environment or internal body conditions. Therefore, the given answer is correct as it accurately describes motor or efferent neurons.

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48. Neurons with specialized dendritic end organs that sense changes in the environment or stimulus are sensory organs (like the eye)

Explanation

Sensory receptors are specialized neurons with dendritic end organs that detect changes in the environment or stimuli. These receptors are responsible for sensing sensory input and converting it into electrical signals that can be processed by the nervous system. This sensory input is then used to generate sensory output, which helps the organism respond to the stimuli in its environment. Therefore, sensory receptors play a crucial role in the sensory system by detecting and transmitting sensory information to the brain.

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49. The resting membrane potential in neurons is ______. Which means that the inside of the cell membrane is more _________ than the outside of the cell.

Explanation

The resting membrane potential in neurons is -70 mV, which means that the inside of the cell membrane is more negative than the outside of the cell. This negative charge is maintained by the selective permeability of the cell membrane to different ions, such as potassium and sodium. The concentration gradients of these ions, along with the activity of ion channels and pumps, contribute to the establishment and maintenance of the resting membrane potential.

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50. The Peripheral Nervous System is the nerves that extend from the brain and spinal cord.

Explanation

The explanation for the given correct answer is that the peripheral nervous system consists of the nerves that extend from the brain and spinal cord to the rest of the body. It is responsible for transmitting signals between the central nervous system and the organs, muscles, and tissues. Thus, it is true that the peripheral nervous system is made up of the nerves that extend from the brain and spinal cord.

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51. Contains neuron cell bodies and unmyelinated nerve fibers

Explanation

Gray matter refers to the region of the central nervous system that contains neuron cell bodies and unmyelinated nerve fibers. It is called gray matter because it appears grayish in color due to the presence of cell bodies and dendrites. Gray matter is responsible for processing and integrating information in the brain, including sensory perception, memory, and decision-making. On the other hand, white matter consists of myelinated nerve fibers and is responsible for transmitting signals between different regions of the brain and spinal cord.

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52. There is one axon per neuron, but an axon can divide or branch off forming ____________

Explanation

An axon is a long, slender projection of a neuron that carries nerve impulses away from the cell body. While there is typically only one axon per neuron, it can divide or branch off into smaller projections called axon terminals. These axon terminals are responsible for transmitting signals to other neurons or target cells, allowing for communication and the relay of information throughout the nervous system.

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53. The parasympathetic division _____________ the visceral organs

Explanation

The parasympathetic division inhibits the visceral organs. This means that it decreases their activity or slows them down. The parasympathetic division is responsible for promoting rest and relaxation in the body, so it is important for it to inhibit or reduce the activity of the visceral organs, such as the heart, lungs, and digestive system. This allows the body to conserve energy and focus on processes like digestion and healing.

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54. Cells that lie beside nerve fibers in the CNS and wrap around these nerve fibers

Explanation

Oligodendrocytes are cells that lie beside nerve fibers in the central nervous system (CNS) and wrap around these nerve fibers. They are responsible for producing myelin, a fatty substance that forms a protective covering around nerve fibers. This myelin sheath helps to insulate and enhance the conduction of electrical impulses along the nerve fibers. Unlike Schwann cells, which perform a similar function but are found in the peripheral nervous system (PNS), oligodendrocytes are specific to the CNS. Ependymal cells are involved in the production of cerebrospinal fluid, while satellite cells provide support and nutrition to neurons in the PNS.

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55. _____________ interprets sensory input and forms a response to that stimulus.

Explanation

The central nervous system is responsible for interpreting sensory input and forming a response to that stimulus. It consists of the brain and spinal cord, which receive and process information from the sensory organs and send signals to the muscles and glands to produce a response. The central nervous system plays a crucial role in coordinating and controlling the body's actions and responses to external stimuli.

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56. _____________ wraps around the axon and forms concentric layers of ___________(same word(s)) plasma which enclose the axon and form the myelin sheath

Explanation

Schwann cells wrap around the axon and form concentric layers of plasma, which enclose the axon and form the myelin sheath.

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57. When sensory receptors are constantly stimulated, they develop _________ in which the receptor slowly decreases its responsiveness to the stimulus. This results in a decrease in nerve impulse frequency or the sensory receptor stops generating nerve impulses.

Explanation

When sensory receptors are constantly stimulated, they develop adaptation in which the receptor slowly decreases its responsiveness to the stimulus. This means that the receptor becomes less sensitive to the stimulus over time, resulting in a decrease in the frequency of nerve impulses generated or even a complete stop in generating nerve impulses. This adaptation allows the sensory system to focus on detecting new or changing stimuli rather than continuously responding to constant stimuli.

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58. Connects neurons to blood capillaries and help to exchange nutrients, oxygen, carbon dioxide, etc, between the blood capillary and neuron forming the blood-brain barrier.

Explanation

Astrocytes are a type of glial cell in the brain that play a crucial role in maintaining the health and function of neurons. They form a barrier known as the blood-brain barrier, which helps to protect the brain from harmful substances and regulate the exchange of nutrients, oxygen, carbon dioxide, and other molecules between the blood capillaries and neurons. Astrocytes also provide structural support to neurons, regulate the chemical environment of the brain, and contribute to synaptic function. Overall, astrocytes are essential for the proper functioning of the brain and its communication with the rest of the body.

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59. Oval cells with long processes that are specialized macrophages in the CNS

Explanation

Microglia are a type of cell found in the central nervous system (CNS) that have oval shapes and long processes. They are specialized macrophages, which means they play a role in the immune response by engulfing and removing cellular debris, pathogens, and dead cells in the CNS. Microglia also have other functions, such as regulating inflammation, supporting neuronal development, and maintaining the health of the CNS. Therefore, microglia are the correct answer because they fit the description of oval cells with long processes that are specialized macrophages in the CNS.

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60. Produce myelin sheaths which cover and insulate the peripheral nerve fibers, and engulf cell debris from damaged nerves which helps in nerve regeneration

Explanation

Schwann cells are responsible for producing myelin sheaths that cover and insulate peripheral nerve fibers. These myelin sheaths help to increase the speed and efficiency of nerve signal transmission. Additionally, Schwann cells also play a crucial role in nerve regeneration by engulfing cell debris from damaged nerves. This process helps to clear the damaged tissue and create an environment conducive to nerve regrowth and repair.

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61. Found in the articular capsules of synovial joints. It monitors joint position and movement.

Explanation

Joint kinesthetic receptors are found in the articular capsules of synovial joints and are responsible for monitoring joint position and movement. These receptors provide information about the position of the joint, the direction and speed of movement, and the amount of force being applied to the joint. They play a crucial role in proprioception, which is the body's ability to sense the position and movement of its parts. Joint kinesthetic receptors help in maintaining balance, coordinating movements, and preventing injuries by providing feedback to the central nervous system.

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62. Cells that line the central cavities of the brain and spinal cord

Explanation

Ependymal cells are a type of cells that line the central cavities of the brain and spinal cord. They are responsible for producing cerebrospinal fluid (CSF) and helping to circulate it within these cavities. Ependymal cells also play a role in the regulation of CSF composition and the movement of substances between the CSF and the nervous tissue. Therefore, they are essential for the proper functioning and protection of the brain and spinal cord.

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63. The sympathetic division _____________ the visceral organs

Explanation

The sympathetic division of the autonomic nervous system is responsible for stimulating the visceral organs. This division activates the "fight or flight" response, which prepares the body for action by increasing heart rate, dilating blood vessels, and releasing stress hormones. Therefore, the correct answer is "stimulates."

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64. Engulf invading microorganisms and dead neural tissue

Explanation

Microglia are specialized cells in the central nervous system that act as the primary immune defense. They are responsible for engulfing and removing invading microorganisms and dead neural tissue. Microglia play a crucial role in maintaining the health and homeostasis of the brain by clearing away debris and promoting tissue repair. They are also involved in regulating inflammation and immune responses in the brain. Overall, microglia are essential for protecting and maintaining the proper functioning of the central nervous system.

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65. A cytoplasmic extension that conducts the nerve impulse away from the cell body except with sensory neurons that conduct in both directions

Explanation

Axons are a type of cytoplasmic extension that conducts nerve impulses away from the cell body. They are responsible for transmitting information from the cell body to other neurons, muscles, or glands. Unlike sensory neurons, which can conduct impulses in both directions, axons typically conduct impulses in one direction only. Therefore, axons are the correct answer in this context.

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66. Which is not a characteristic of the cell body?

Explanation

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67. Neurons are classified based on the _________ which the nerve impulse is traveling in reference to the CNS

Explanation

Neurons are classified based on the direction in which the nerve impulse is traveling in reference to the central nervous system (CNS). This classification helps in understanding the flow of information within the nervous system. By categorizing neurons based on their direction, we can identify whether the impulse is traveling towards the CNS (sensory neurons) or away from the CNS (motor neurons). This information is crucial for studying and comprehending the functioning of the nervous system.

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68. The two subdivisions of the motor division are ___________ & _____________

Explanation

The correct answer is Autonomic Nervous System and Somatic Nervous System. The motor division of the nervous system is responsible for controlling voluntary and involuntary movements. The autonomic nervous system controls involuntary actions such as heart rate, digestion, and breathing. The somatic nervous system controls voluntary movements of skeletal muscles.

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69. Cells that are associated with Schwann cells in the PNS

Explanation

Satellite cells are the correct answer because they are a type of glial cell that is associated with Schwann cells in the peripheral nervous system (PNS). Satellite cells are found in clusters around the cell bodies of neurons in the PNS and provide support and protection to these neurons. They help regulate the extracellular environment around the neurons and play a role in the repair and regeneration of damaged nerve tissue. Hence, satellite cells are the cells that are associated with Schwann cells in the PNS.

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70. The axon terminal releases neurotransmitters into the ________

Explanation

The axon terminal releases neurotransmitters into the synapse. The synapse is the small gap between the axon terminal of one neuron and the dendrite or cell body of another neuron. When an action potential reaches the axon terminal, it triggers the release of neurotransmitters into the synapse. These neurotransmitters then bind to receptors on the dendrite or cell body of the post-synaptic neuron, transmitting the signal from one neuron to another.

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71. There are two subdivisions of the PNS. They are called __________

Explanation

The correct answer is Sensory (afferent) division & Motor (efferent) division. The peripheral nervous system (PNS) is divided into two subdivisions: the sensory division and the motor division. The sensory division, also known as the afferent division, is responsible for transmitting sensory information from the body to the central nervous system (CNS). The motor division, also known as the efferent division, is responsible for transmitting motor commands from the CNS to the muscles and glands in the body.

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72. What are the two types of cells in nervous tissue?

Explanation

The two types of cells in nervous tissue are supporting cells and neurons. Supporting cells, also known as glial cells, provide structural support and insulation to neurons. They also help in the maintenance and protection of neurons. Neurons, on the other hand, are responsible for transmitting electrical signals and information throughout the nervous system. They are the primary functional units of the nervous system and play a crucial role in sensory perception, motor control, and cognitive processes.

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73. Controls the chemical environment around the neurons in the PNS

Explanation

Satellite cells are a type of glial cell that are found in the peripheral nervous system (PNS). They are primarily responsible for providing support and protection to the neurons in the PNS. One of their main functions is to control the chemical environment around the neurons. They help regulate the levels of ions, neurotransmitters, and other substances necessary for proper neuronal function. By doing so, satellite cells ensure that the neurons in the PNS are able to communicate effectively and maintain homeostasis.

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74. Sensory input:

Explanation

The correct answer is "monitors changes that occur both inside and outside of the body through sensory receptors." This answer accurately describes the function of the sensory input in the nervous system. Sensory input refers to the process of detecting and interpreting information from the sensory receptors, which can be located both internally and externally. This information allows the nervous system to monitor changes in the environment and within the body, which is essential for generating appropriate responses and maintaining homeostasis.

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75. Each arises from the axon hillock of the cell body.

Explanation

The statement "Each arises from the axon hillock of the cell body" suggests that the given options are different parts of a neuron. The axon hillock is a specialized region of the cell body where the axon originates. The axon is a long, slender projection that carries electrical signals away from the cell body. Therefore, the correct answer is axon, as it is the only option that arises from the axon hillock.

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76. Found both in the PNS and the CNS. The CNS contains cell bodies and their processes and these are call tracts in the CNS. The PNS contains mostly these called nerves

Explanation

The correct answer is "neuron processes." Neuron processes refer to the extensions of a neuron that transmit signals to and from other cells. These processes include both dendrites and axons, which are found in both the peripheral nervous system (PNS) and the central nervous system (CNS). In the CNS, these processes are organized into tracts, while in the PNS they are primarily referred to as nerves.

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77. Type of receptor for cold

Explanation

Krause end bulbs are a type of receptor for cold. They are located in the skin and are responsible for detecting cold temperatures. These specialized sensory receptors are able to sense changes in temperature and transmit this information to the brain, allowing us to perceive cold sensations. Unlike other types of receptors listed, such as Ruffini's corpuscles, Meissner's corpuscles, and Pacinian corpuscles, Krause end bulbs specifically respond to cold stimuli.

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78. Information from the outside world (sound, pressure, etc) is converted into ____________ by the sensory receptors and is sent to the CNS. 

Explanation

When information from the outside world, such as sound or pressure, is detected by sensory receptors, it is converted into nerve impulses. These nerve impulses are then transmitted to the central nervous system (CNS), which includes the brain and spinal cord. Nerve impulses are electrical signals that travel along nerve fibers, allowing the sensory information to be processed and interpreted by the brain.

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79. Sense tendon stretch caused by muscle contraction. The muscle contracts but doesn't move the object causing tendon stretching which activates _______ which inhibit the muscle contraction

Explanation

When a muscle contracts but doesn't move the object, the tendon connected to the muscle stretches. This stretching is detected by Golgi tendon organs, which are sensory receptors located in the tendons. The Golgi tendon organs then send signals to the central nervous system, which activates inhibitory interneurons. These interneurons inhibit the muscle contraction, preventing further muscle contraction and potential damage to the tendon. Therefore, the Golgi tendon organs play a crucial role in regulating muscle contraction and protecting the tendons from excessive strain.

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80. Nervous tissue is made up of cells (about 80% ______ and 20% ________)

Explanation

Nervous tissue is composed of cells and extracellular space. The cells in nervous tissue, such as neurons, are responsible for transmitting and processing electrical signals. The extracellular space provides support and allows for the exchange of nutrients and waste products between cells. Together, these components make up the structure and function of nervous tissue.

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81. Unmyelinated nerve fibers (about 15 fibers) are enclosed by a single Schwann cell

Explanation

In the peripheral nervous system, unmyelinated nerve fibers are indeed enclosed by a single Schwann cell. This is in contrast to myelinated nerve fibers, which have multiple Schwann cells wrapping around them in a segmented manner. The Schwann cell provides support and insulation to the nerve fiber, aiding in the conduction of nerve impulses. Therefore, the statement that unmyelinated nerve fibers are enclosed by a single Schwann cell is true.

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82. Neurons can reproduce and replace dead cells, but neurons can not regenerate even if cellular damage is not too severe for example when an axon of a peripheral nerve is cut.

Explanation

Neurons cannot reproduce and replace dead cells, and they also cannot regenerate if cellular damage is not too severe. This is evident when an axon of a peripheral nerve is cut, as it does not regenerate. Therefore, the statement that neurons can reproduce and replace dead cells is false.

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83. Type of receptor for pain

Explanation

Free nerve endings are the type of receptors for pain. These nerve endings are widely distributed throughout the body and are responsible for detecting and transmitting pain signals to the brain. They are the most common type of sensory receptor and are found in the skin, connective tissues, and internal organs. When stimulated by various stimuli such as pressure, temperature, or tissue damage, these nerve endings generate electrical signals that are transmitted to the brain, resulting in the perception of pain.

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84. Cordlike organs of the PNS. made up of bundles of nerve fibers (both myelinated and unmyelinated axons)

Explanation

Nerves are cordlike organs of the peripheral nervous system (PNS) that are made up of bundles of nerve fibers, including both myelinated and unmyelinated axons. Nerves play a crucial role in transmitting signals between different parts of the body and the central nervous system. They allow for the communication and coordination of various bodily functions.

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85. Covers and insulates the nerve fibers with myelin sheaths

Explanation

Oligodendrocytes are a type of glial cell in the central nervous system that are responsible for producing and maintaining the myelin sheath, which covers and insulates nerve fibers. The myelin sheath helps to speed up the conduction of electrical impulses along the nerve fibers, allowing for more efficient communication between neurons. Oligodendrocytes play a crucial role in the proper functioning of the nervous system by providing support and protection to the nerve fibers.

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86. Pain receptors develop adaptation after long period of time.

Explanation

Pain receptors do not develop adaptation over time. In fact, pain receptors are designed to be highly sensitive and responsive to potential harm or injury. This sensitivity allows us to quickly detect and respond to painful stimuli, helping us to protect ourselves from further harm. Therefore, the statement that pain receptors develop adaptation after a long period of time is false.

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87. How many types of supporting cells are there?

Explanation

There are six types of supporting cells.

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88. Sense muscle stretch and form a reflex loop that causes a stretched muscle to contract and return to its resting length

Explanation

Muscle spindles are sensory receptors located within skeletal muscles that detect changes in muscle length. When a muscle is stretched, the muscle spindle sends signals to the spinal cord, which then triggers a reflex action. This reflex action causes the stretched muscle to contract, allowing it to return to its resting length. Therefore, the muscle spindle plays a crucial role in maintaining muscle tone and preventing overstretching or damage to the muscle.

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89. The nervous system is the master control and communication system of the body which is involved in every ______________, _______________, ______________.

Explanation

The nervous system plays a crucial role in every aspect of our lives. It is responsible for processing and transmitting signals that allow us to think, make decisions, and experience emotions. It controls our actions by sending signals to our muscles, enabling us to move and interact with the world around us. Additionally, it plays a significant role in regulating our emotions, allowing us to feel and express various feelings. Overall, the nervous system is involved in thought, action, and emotion, making it the master control and communication system of the body.

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90. The information converted to nerve impulses becomes encoded in the ______________.

Explanation

When information is converted to nerve impulses, it becomes encoded in the frequency of the nerve impulses. This means that the rate at which the nerve impulses are fired carries the information. The higher the frequency of the nerve impulses, the stronger the signal being transmitted. Therefore, the correct answer is "nerve impulse frequency."

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91. Type of receptor for heat

Explanation

Ruffini's corpuscles are a type of receptor for heat. These sensory receptors are located in the skin and are responsible for detecting changes in temperature. They are sensitive to warmth and are particularly important for the perception of prolonged heat stimuli. Ruffini's corpuscles have elongated capsules that contain nerve endings, which respond to the stretching of the skin caused by heat. This allows them to detect and transmit signals related to heat sensation to the brain.

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92. Neurons that lie between sensory and motor neurons and they shuttle signals in the CNS. They are multipolar neurons that lie in the CNS and they make up 99% of the neurons in the body including brain cells

Explanation

Association neurons, also known as interneurons, are the correct answer. These neurons are located between sensory and motor neurons and they transmit signals within the central nervous system (CNS). They are multipolar neurons and make up the majority (99%) of neurons in the body, including brain cells.

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93. Which are the three special characteristics of a neuron?

Explanation

The three special characteristics of a neuron are longevity, high metabolic rate, and amitotic. Neurons are able to function for a person's entire lifetime, hence the term "longevity." They also have a high metabolic rate, meaning they require a lot of energy to function properly. Lastly, neurons are amitotic, which means they are unable to undergo cell division. This characteristic is important because it explains why damage to neurons is often permanent and why they cannot be replaced easily.

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94. Cytoplasmic extensions from the cell body which are called nerve fibers

Explanation

Neuron processes refer to the cytoplasmic extensions from the cell body, which are called nerve fibers. These processes include both the dendrites and the axon. Dendrites receive signals from other neurons and transmit them towards the cell body, while the axon carries signals away from the cell body to other neurons or target cells. Therefore, neuron processes play a crucial role in transmitting and receiving information within the nervous system.

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95. Type of receptor for touch

Explanation

Merkel disks and Meissner's corpuscles are both types of receptors for touch. Merkel disks are located in the skin's outer layer and are responsible for detecting light touch and pressure. Meissner's corpuscles, on the other hand, are found in the dermal papillae of hairless skin and are responsible for detecting light touch and vibration. Free nerve endings are not specific to touch and can detect various sensations, while Pacinian corpuscles are responsible for detecting deep pressure and vibration.

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96. _____________ are nerve fibers that carry information from the CNS to efferent organs (muscles and glands). 

Explanation

Motor divisions and efferent divisions are nerve fibers that carry information from the central nervous system (CNS) to efferent organs such as muscles and glands. Both terms refer to the same concept and can be used interchangeably to describe this function.

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97. The nucleus and cytoplasm of the Schwann cell is on the outside of the myelin sheath and are called the ____________.

Explanation

The correct answer is Neurilemma, Sheath of Schwann. The nucleus and cytoplasm of the Schwann cell are located on the outside of the myelin sheath. The term "neurilemma" refers to the outermost layer of the Schwann cell, which surrounds the myelin sheath. The term "sheath of Schwann" is another way to describe the myelin sheath itself.

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The Central Nervous System consists of the brain and spinal cord.
Generate and conduct nerve impulses away from the cell body
The neurotransmitter will either excite or inhibit the post-synaptic...
The autonomic nervous system are nerve fibers that control the...
______________ nerves carry information to and from the spinal cord
Range in length from a few millimeters to more than one meter
Neurons are highly excitable and when they are stimulated they...
_____________ are nerve fibers which carry information from the...
Myelin sheaths are formed by ____________ cells in the PNS. 
Carry nerve impulses away from the CNS only
The Nervous System is divided into two parts. They are called:
An increase in the membrane potential or the membrane potential...
The Peripheral Nervous System is an information channel which links...
The somatic nervous system are nerve fibers that carry impulses from...
A whitish, fatty segmented covering over the axon of neurons
Schwann cells are seperated from one another by ________. These are...
Changes in membrane potential act as communication signals which are...
The Autonomic Nervous system is also known as
Neurons that transmit nerve impulses from the CNS to the effector...
A nerve cell that transmits nerve impulses from one part of the body...
A cone-shaped region of the cell body
Nerves that transmit nerve impulses from sensory receptors toward the...
Carry nerve impulses toward the CNS only
____________ is the integration and command centers of the nervous...
Cells in the peripheral nervous system that surround and cover nerve...
In the CNS where there are dense concentrations of myelinated nerve...
Are unipolar neurons whose cell bodies are in the sensory ganglia...
Contain both sensory and motor fiber which transmits impulses to and...
A neuron has a potential different between the inside and outside of...
Most neurons release one type of neurotransmitter, but some neurons...
Protects and insulates the axon and increases the speed of nerve...
A reduction in the membrane potential or the inside of the membrane...
_____________ nerves carry information to and from the brain
_____________ are nonexcitable cells that surround neurons forming the...
Perikaryon is another name for
___________ are nerve fibers that conduct sensory information from...
The ________________ (two words) generates nerve impulses and the axon...
Star shaped cells that are found in the CNS and they make up about 50%...
The junction where information is passed from one neuron to another...
The somatic nervous system is also known as
Type of receptor for deep pressure
Short, thick, branching cytoplasmic extensions which act as...
Produce the cerebrospinal fluid (CSF) that fills the central cavities...
Myelin sheaths in the CNS are formed by _____________ where one can...
______________ nerve fibers from the skin, muscle, or joint that carry...
The somatic nervous system are nerve fibers that control the activity...
Multipolar neurons whose cell bodies are in the CNS
Neurons with specialized dendritic end organs that sense changes in...
The resting membrane potential in neurons is ______. Which means that...
The Peripheral Nervous System is the nerves that extend from the brain...
Contains neuron cell bodies and unmyelinated nerve fibers
There is one axon per neuron, but an axon can divide or branch off...
The parasympathetic division _____________ the visceral organs
Cells that lie beside nerve fibers in the CNS and wrap around these...
_____________ interprets sensory input and forms a response to that...
_____________ wraps around the axon and forms concentric layers of...
When sensory receptors are constantly stimulated, they develop...
Connects neurons to blood capillaries and help to exchange nutrients,...
Oval cells with long processes that are specialized macrophages in the...
Produce myelin sheaths which cover and insulate the peripheral nerve...
Found in the articular capsules of synovial joints. It monitors joint...
Cells that line the central cavities of the brain and spinal cord
The sympathetic division _____________ the visceral organs
Engulf invading microorganisms and dead neural tissue
A cytoplasmic extension that conducts the nerve impulse away from the...
Which is not a characteristic of the cell body?
Neurons are classified based on the _________ which the nerve impulse...
The two subdivisions of the motor division are ___________ &...
Cells that are associated with Schwann cells in the PNS
The axon terminal releases neurotransmitters into the ________
There are two subdivisions of the PNS. They are called __________
What are the two types of cells in nervous tissue?
Controls the chemical environment around the neurons in the PNS
Sensory input:
Each arises from the axon hillock of the cell body.
Found both in the PNS and the CNS. The CNS contains cell bodies and...
Type of receptor for cold
Information from the outside world (sound, pressure, etc) is converted...
Sense tendon stretch caused by muscle contraction. The muscle...
Nervous tissue is made up of cells (about 80% ______ and 20% ________)
Unmyelinated nerve fibers (about 15 fibers) are enclosed by a single...
Neurons can reproduce and replace dead cells, but neurons can not...
Type of receptor for pain
Cordlike organs of the PNS. made up of bundles of nerve fibers (both...
Covers and insulates the nerve fibers with myelin sheaths
Pain receptors develop adaptation after long period of time.
How many types of supporting cells are there?
Sense muscle stretch and form a reflex loop that causes a stretched...
The nervous system is the master control and communication system of...
The information converted to nerve impulses becomes encoded in the...
Type of receptor for heat
Neurons that lie between sensory and motor neurons and they shuttle...
Which are the three special characteristics of a neuron?
Cytoplasmic extensions from the cell body which are called nerve...
Type of receptor for touch
_____________ are nerve fibers that carry information from the CNS to...
The nucleus and cytoplasm of the Schwann cell is on the outside of the...
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