Physiology Quiz Chapter 5
-
The Central Nervous System consists of the brain and spinal cord.
-
True
-
False
-
About This Quiz
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 not 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!
Quiz Preview
- 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.Rate this question:
- 3.
The neurotransmitter will either excite or inhibit the post-synaptic neuron or effector cell
-
True
-
False
Correct Answer
A. TrueExplanation
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.Rate this question:
-
- 4.
The autonomic nervous system are nerve fibers that control the activity of smooth muscles, cardiac muscles, and glands.
-
True
-
False
Correct Answer
A. TrueExplanation
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.Rate this question:
-
- 5.
______________ nerves carry information to and from the spinal cord
Correct Answer
SpinalExplanation
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."Rate this question:
- 6.
Range in length from a few millimeters to more than one meter
Correct Answer
axonExplanation
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.Rate this question:
- 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
-
True
-
False
Correct Answer
A. TrueExplanation
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.Rate this question:
-
- 8.
_____________ are nerve fibers which carry information from the visceral organs to the CNS. (inside body information)
-
Somatic afferents
-
Visceral afferents
Correct Answer
A. Visceral afferentsExplanation
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.Rate this question:
-
- 9.
Myelin sheaths are formed by ____________ cells in the PNS.
Correct Answer
Schwann
Schwann cellsExplanation
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.Rate this question:
- 10.
Carry nerve impulses away from the CNS only
-
Mixed nerves
-
Sensory nerves
-
Motor nerves
Correct Answer
A. Motor nervesExplanation
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.Rate this question:
-
- 11.
The Nervous System is divided into two parts. They are called:
-
Parasympathetic Nervous System and Sympathetic Nervous System
-
Autonomic Nervous System and Somatic Nervous System
-
Peripheral Nervous System and Central Nervous System
Correct Answer
A. Peripheral Nervous System and Central Nervous SystemExplanation
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.Rate this question:
-
- 12.
An increase in the membrane potential or the membrane potential becomes more negative
-
Depolarization
-
Hyperpolarization
Correct Answer
A. HyperpolarizationExplanation
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.Rate this question:
-
- 13.
The Peripheral Nervous System is an information channel which links the body parts with the Central Nervous System
-
True
-
False
Correct Answer
A. TrueExplanation
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.Rate this question:
-
- 14.
The somatic nervous system are nerve fibers that carry impulses from the CNS to the skeletal muscles.
-
True
-
False
Correct Answer
A. TrueExplanation
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.Rate this question:
-
- 15.
A whitish, fatty segmented covering over the axon of neurons
Correct Answer
myelin sheathExplanation
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.Rate this question:
- 16.
Schwann cells are seperated from one another by ________. These are gaps between the Schwann cells.
Correct Answer
nodes of ranvier
noes of ranveirExplanation
Schwann cells are separated from one another by nodes of Ranvier. These nodes are gaps between the Schwann cells.Rate this question:
- 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.
-
True
-
False
Correct Answer
A. TrueExplanation
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.Rate this question:
-
- 18.
The Autonomic Nervous system is also known as
Correct Answer
involuntary nervous systemExplanation
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.Rate this question:
- 19.
Neurons that transmit nerve impulses from the CNS to the effector organs (muscles or glands)
-
Sensory or afferent neurons
-
Motor or efferent neurons
Correct Answer
A. Motor or efferent neuronsExplanation
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.Rate this question:
-
- 20.
A nerve cell that transmits nerve impulses from one part of the body to another
Correct Answer
NeuronExplanation
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.Rate this question:
- 21.
A cone-shaped region of the cell body
Correct Answer
axon hillockExplanation
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.Rate this question:
- 22.
Nerves that transmit nerve impulses from sensory receptors toward the CNS.
-
Sensory or afferent neurons
-
Motor or efferent neurons
Correct Answer
A. Sensory or afferent neuronsExplanation
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.Rate this question:
-
- 23.
Carry nerve impulses toward the CNS only
-
Mixed nerves
-
Sensory nerves
-
Motor nerves
Correct Answer
A. Sensory nervesExplanation
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.Rate this question:
-
- 24.
____________ is the integration and command centers of the nervous system.
-
Central Nervous System
-
Peripheral Nervous System
-
Somatic Nervous System
-
Parasympathetic Nervous System
Correct Answer
A. Central Nervous SystemExplanation
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.Rate this question:
-
- 25.
Cells in the peripheral nervous system that surround and cover nerve fibers
-
Satellite Cells
-
Astrocytes
-
Schwann Cells
-
Microglia
Correct Answer
A. Schwann CellsExplanation
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.Rate this question:
-
- 26.
In the CNS where there are dense concentrations of myelinated nerve fiber. This is called the __________
-
White matter
-
Gray matter
Correct Answer
A. White matterExplanation
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.Rate this question:
-
- 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.
-
Sensory or afferent neurons
-
Motor or efferent neurons
Correct Answer
A. Sensory or afferent neuronsExplanation
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.Rate this question:
-
- 28.
Contain both sensory and motor fiber which transmits impulses to and from the CNS
-
Mixed nerves
-
Sensory nerves
-
Motor nerves
Correct Answer
A. Mixed nervesExplanation
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.Rate this question:
-
- 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.
-
Watts
-
Voltage
-
Electricity
-
Power
Correct Answer
A. VoltageExplanation
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.Rate this question:
-
- 30.
Most neurons release one type of neurotransmitter, but some neurons may release more than one neurotransmitter.
-
True
-
False
Correct Answer
A. TrueExplanation
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.Rate this question:
-
- 31.
Protects and insulates the axon and increases the speed of nerve impulses
Correct Answer
myelinExplanation
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.Rate this question:
- 32.
A reduction in the membrane potential or the inside of the membrane becomes less negative (approaches zero)
-
Depolarization
-
Hyperpolarization
Correct Answer
A. DepolarizationExplanation
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.Rate this question:
-
- 33.
_____________ nerves carry information to and from the brain
Correct Answer
CranialExplanation
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.Rate this question:
- 34.
_____________ are nonexcitable cells that surround neurons forming the scaffolding of the nervous tissue
-
Dendrites
-
Neurons
-
Supporting cells
-
Bacteria
Correct Answer
A. Supporting cellsExplanation
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.Rate this question:
-
- 35.
Perikaryon is another name for
Correct Answer
cell bodyExplanation
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.Rate this question:
- 36.
___________ are nerve fibers that conduct sensory information from peripheral sensory receptors to the CNS
-
Motor or efferent division
-
Somatic division
-
Autonomic division
-
Sensory or afferent division
Correct Answer
A. Sensory or afferent divisionExplanation
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.Rate this question:
-
- 37.
The ________________ (two words) generates nerve impulses and the axon conducts the impulse to the axon terminals
Correct Answer
axon hillockExplanation
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.Rate this question:
- 38.
Star shaped cells that are found in the CNS and they make up about 50% of nervous tissue volume
-
Oligodendrocytes
-
Microglia
-
Schwann Cells
-
Astrocytes
-
Ependymal Cells
Correct Answer
A. AstrocytesExplanation
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.Rate this question:
-
- 39.
The junction where information is passed from one neuron to another neuron or from an neuron to an effector cell
-
Cleft
-
Node of ranvier
-
Synapse
-
Nerve gap
Correct Answer
A. SynapseExplanation
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.Rate this question:
-
- 40.
The somatic nervous system is also known as
Correct Answer
voluntary nervous systemExplanation
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.Rate this question:
- 41.
Type of receptor for deep pressure
-
Krause end bulbs
-
Pacinian corpuscles
-
Ruffini's corpuscles
-
Free nerve endings
Correct Answer
A. Pacinian corpusclesExplanation
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.Rate this question:
-
- 42.
Short, thick, branching cytoplasmic extensions which act as receptive sites. Receive nerve impulses and conduct them toward the cell body.
-
Terminals
-
Axons
-
Hillocks
-
Dendrites
Correct Answer
A. DendritesExplanation
Dendrites are short, thick, branching cytoplasmic extensions that act as receptive sites. They receive nerve impulses and conduct them toward the cell body.Rate this question:
-
- 43.
Produce the cerebrospinal fluid (CSF) that fills the central cavities of the brain and spinal cord. Their cilia circulate the CSF.
-
Schwann Cells
-
Satellite Cells
-
Oligodendrocytes
-
Ependymal Cells
Correct Answer
A. Ependymal CellsExplanation
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.Rate this question:
-
- 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.
-
Astrocytes
-
Microglia
-
Satellite cells
-
Oligodendrocytes
Correct Answer
A. OligodendrocytesExplanation
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.Rate this question:
-
- 45.
______________ nerve fibers from the skin, muscle, or joint that carry sensory information to CNS (outside body information)
-
Visceral afferents
-
Somatic afferents
Correct Answer
A. Somatic afferentsExplanation
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.Rate this question:
-
- 46.
The somatic nervous system are nerve fibers that control the activity of smooth muscles, cardiac muscles, and glands.
-
True
-
False
Correct Answer
A. FalseExplanation
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.Rate this question:
-
- 47.
Multipolar neurons whose cell bodies are in the CNS
-
Sensory or afferent neurons
-
Motor or efferent neurons
Correct Answer
A. Motor or efferent neuronsExplanation
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.Rate this question:
-
- 48.
Neurons with specialized dendritic end organs that sense changes in the environment or stimulus are sensory organs (like the eye)
-
Sensory output
-
Sensory input
-
Motor output
-
Sensory receptors
Correct Answer
A. Sensory receptorsExplanation
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.Rate this question:
-
- 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.
-
60 mV; positive
-
- 60 mV; negative
-
70 mV; positive
-
- 70 mV; negative
Correct Answer
A. - 70 mV; negativeExplanation
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.Rate this question:
-
Quiz Review Timeline (Updated): Mar 21, 2023 +
Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
-
Current Version
-
Mar 21, 2023Quiz Edited by
ProProfs Editorial Team -
Oct 13, 2009Quiz Created by
Kmd5433
​Dr Gawad Physiology Course Online Exams – EEG, Sleep, Thalamus, Hypothalamus, Limbic system
​Dr Gawad Physiology Course Online Exams – EEG, Sleep, Thalamus, Hypothalamus, Limbic system
Back to top