Biology Exam Review: Quiz! MCQ

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What are the principal kinds of tissues invertebrates?
- Skeletal and nervous
- Nervous and muscle
- Smooth and nervous
- Smooth and nervous
- Muscle

About This Quiz

The 'Biology Exam Review: MCQ' assesses knowledge on tissue types in vertebrates, body cavities, embryonic germ layers, and their contributions to body structures like skin, hair, and muscles. This quiz is crucial for understanding fundamental anatomical concepts.

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2.

The ventral cavity is divided into what two cavities?
- Thoracic and mesoderm
- Abdominal and diaphragm
Correct Answer

A. Abdominal and diaphragm
3.

Which of these is not apart of the coelom
- Pericardial
- Parietal
- Peritoneal
- Pleural
Correct Answer

A. Parietal

Explanation

The term "coelom" refers to the body cavity found in many animals. It is divided into different regions, including the pericardial, peritoneal, and pleural cavities. These cavities are lined by specific membranes, such as the pericardium, peritoneum, and pleura. However, the parietal cavity is not a part of the coelom. The term "parietal" refers to the outer layer of a cavity or organ, and it is not a specific region within the coelom.

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4.

The ectoderm gives rise to what?
- It gives rise to blood tissue
- It gives rise to skin and hair
- It gives rise to the lining of GI tract
Correct Answer

A. It gives rise to skin and hair

Explanation

The ectoderm is one of the three primary germ layers that form during embryonic development. It gives rise to various structures, including the skin and hair. The ectoderm is responsible for the development of the epidermis, which is the outermost layer of the skin, as well as the structures derived from it, such as hair follicles. Therefore, the correct answer is that the ectoderm gives rise to skin and hair.

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5.

The other coverings of the body and nervous system develop from what "germ layer"
- Ectoderm
- Endoderm
- Mesoderm
Correct Answer

A. Ectoderm

Explanation

The ectoderm is the germ layer responsible for developing the outer coverings of the body, such as the skin, hair, and nails. It also gives rise to the nervous system, including the brain and spinal cord. The endoderm, on the other hand, develops into the inner linings of organs, such as the digestive tract and respiratory system. The mesoderm forms the middle layer and gives rise to structures like muscles, bones, and blood vessels. Therefore, the correct answer is ectoderm because it specifically refers to the development of the body coverings and nervous system.

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6.

The muscle forms from what type of tissue "germ layer"?
- Endoderm
- Ectoderm
- Mesoderm
Correct Answer

A. Mesoderm

Explanation

The muscle forms from mesoderm tissue. During embryonic development, the mesoderm layer gives rise to various structures including muscle tissue. Mesoderm cells differentiate into myoblasts, which further develop into muscle fibers. These muscle fibers then form the different types of muscles in the body, such as skeletal, smooth, and cardiac muscles. Therefore, the correct answer is mesoderm.

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7.

Which germ layer gives rise to the lining of GI tract?
- Mesoderm
- Ectoderm
- Endoderm
Correct Answer

A. Endoderm

Explanation

The correct answer is endoderm. During embryonic development, the endoderm germ layer gives rise to the lining of the gastrointestinal (GI) tract. This includes the innermost layer of the digestive system, which includes the mucosa, submucosa, and muscularis layers. The endoderm also gives rise to other organs such as the liver, pancreas, and lungs.

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8.

Deuterosomes show patterns of what type of cleavage
- Radial
- Spiral
- Helix
Correct Answer

A. Radial

Explanation

Deuterostomes show patterns of radial cleavage. Radial cleavage is a type of embryonic development where the cells divide in a pattern that is perpendicular or at right angles to the polar axis of the embryo. This results in cells being stacked directly on top of each other. This type of cleavage is characteristic of deuterostomes, which include animals such as echinoderms (like starfish) and chordates (like humans). In contrast, spiral cleavage is seen in protostomes, where the cell divisions are diagonal to the polar axis, and helical cleavage is a rare type of cleavage that is not commonly observed in animal development.

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9.

What is the most evolved phylum with three germ layers?
- Porifera
- Chordata
Correct Answer

A. Chordata

Explanation

Chordata is the most evolved phylum with three germ layers because it includes animals with a notochord, a dorsal nerve cord, and pharyngeal slits or pouches at some point in their life cycle. These characteristics are considered advanced and are unique to chordates. Porifera, on the other hand, is a phylum that includes simple multicellular organisms like sponges, which do not have three germ layers or the advanced features found in chordates.

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10.

What is an example of a pseudocoelomate?
- Flat worm
- Earth worm
- Round worm
- Annelid
Correct Answer

A. Round worm

Explanation

A roundworm is an example of a pseudocoelomate. Pseudocoelomates are organisms that have a fluid-filled body cavity called a pseudocoelom, which is not completely lined by mesoderm. Roundworms have a pseudocoelom that acts as a hydrostatic skeleton, providing support and allowing for movement. They are found in various environments and can be parasitic or free-living.

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11.

The traditional classification had animals classified into how many different phyla?
- 26
- 38
- 36
- 34
Correct Answer

A. 36

Explanation

The traditional classification system categorizes animals into different phyla. The correct answer is 36, which means that according to this system, there are 36 distinct phyla into which animals are classified.

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12.

True of false a porifera has no symmetry?
- True
- False
Correct Answer

A. True

Explanation

Porifera, commonly known as sponges, indeed have no symmetry. They lack any definite shape or symmetry due to their simple and primitive body organization. Unlike other animals that possess radial or bilateral symmetry, sponges have irregular and asymmetrical body structures. This means that if a sponge is divided into two halves, the halves will not be mirror images of each other. Therefore, the statement "a porifera has no symmetry" is true.

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13.

What type of evidence is different from the traditional classification of animals as opposed to the modern classification?
- Rearrangement of pseudocolomates, aceolomates, and ceolomates
- Establishes two new clades, Ecdysozoa, Lopotrochozoa
- They used DNA sequencing to establish new clades
- All of the above
Correct Answer

A. All of the above

Explanation

The correct answer is "All of the above" because all of the given options represent differences between the traditional and modern classification of animals. The rearrangement of pseudocoelomates, acoelomates, and coelomates suggests a shift in the way animals are grouped based on their body cavities. The establishment of two new clades, Ecdysozoa and Lophotrochozoa, indicates a new way of categorizing animals based on evolutionary relationships. Lastly, the use of DNA sequencing as evidence for classification is a modern approach that was not available in traditional classification systems.

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14.

What type of synapses are the vast majority of synapses in vertebrate?
- Chemical
- Electrical
- Neurological
- Synaptic cleft
Correct Answer

A. Chemical

Explanation

The vast majority of synapses in vertebrates are chemical synapses. Chemical synapses involve the release of neurotransmitters from the presynaptic neuron into the synaptic cleft, which then bind to receptors on the postsynaptic neuron, allowing for the transmission of signals between neurons. This type of synapse is the most common and important mechanism for communication between neurons in the vertebrate nervous system. Electrical synapses, on the other hand, involve direct electrical coupling between neurons, but they are relatively rare compared to chemical synapses. Neurological and synaptic cleft are not types of synapses.

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15.

Nerve impulses travel along the long cellular extension of the neuron called the?
- Cell body, dendrites, myelinated neurons
- Dendrites, synapses, action potential
- Cell body, axon, chemical synapses
- Dendrites, axon, cell body
Correct Answer

A. Dendrites, axon, cell body

Explanation

Nerve impulses travel along the long cellular extension of the neuron called the dendrites, axon, and cell body. The dendrites receive signals from other neurons and transmit them towards the cell body. The cell body processes the incoming signals and generates an electrical impulse. This impulse then travels along the axon, a long fiber-like structure, to transmit the signal to other neurons or target cells. Therefore, the correct answer is dendrites, axon, cell body.

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16.

_______ is an impulse in a neuron taking the form of a wave of depolarization or hyperpolarization imposed on a polarized cell surface.

Correct Answer
graded potential
transduction
action potential
Chordata

Explanation
The correct answer is action potential. An action potential is an electrical impulse that travels along the surface of a polarized cell, causing depolarization or hyperpolarization. It is a rapid and brief change in the cell's membrane potential, which allows for the transmission of signals in the nervous system. Graded potentials, on the other hand, are small changes in membrane potential that can either be depolarizing or hyperpolarizing, but they do not propagate like action potentials. Transduction refers to the conversion of one form of energy into another, and Chordata is a phylum of animals that includes vertebrates.

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17.

_____ produce myelin in the PNS.

Correct Answer
oligodendrocytes
Schwann cells
salutatory conduction

Explanation
Oligodendrocytes and Schwann cells are the two types of cells that produce myelin in the peripheral nervous system (PNS). Oligodendrocytes are responsible for producing myelin in the central nervous system (CNS), while Schwann cells produce myelin in the PNS. Myelin is a fatty substance that wraps around nerve fibers, acting as an insulator and increasing the speed of electrical signals. Salutatory conduction refers to the rapid jumping of the electrical signal from one node of Ranvier to another, facilitated by the presence of myelin. Therefore, all three options - oligodendrocytes, Schwann cells, and salutatory conduction - are related to the production and function of myelin in the PNS.

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18.

What is the sequential order by which sensory information is conveyed to the CNS?
- Stimulation,transmission,transduction,interpretation
- Stimulation,transduction,transmission,interpretation
- Stimulation,interpretation,transmission, transduction
- Transduction,interpretation,stimulation,interpretation
Correct Answer

A. Stimulation,transduction,transmission,interpretation

Explanation

The correct answer is stimulation, transduction, transmission, interpretation. This is the correct sequential order by which sensory information is conveyed to the CNS. Stimulation refers to the activation of sensory receptors by external stimuli. Transduction is the process of converting the stimulus into an electrical signal that can be transmitted. Transmission involves the transmission of the electrical signal from the sensory receptors to the CNS through specialized pathways. Finally, interpretation occurs in the CNS where the sensory information is processed and understood.

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19.

What structure does not make up the vestibular apparatus?
- Utricle canals
- Saccule
- Semicircular canals
- Utricle
Correct Answer

A. Utricle canals

Explanation

The correct answer is "Utricle canals." The vestibular apparatus is responsible for maintaining balance and spatial orientation. It consists of the utricle, saccule, and semicircular canals. The utricle canals mentioned in the answer are not a part of the vestibular apparatus.

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20.

True or false, poikilotherms allow their body temperature to conform to their environment?
- T
- F
Correct Answer

A. T

Explanation

Poikilotherms are organisms whose body temperature varies with their environment. Unlike homeotherms, which maintain a constant internal body temperature, poikilotherms allow their body temperature to conform to the temperature of their surroundings. Therefore, the statement "poikilotherms allow their body temperature to conform to their environment" is true.

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21.

Which of the following is not in themselves maintain homeostasis?
- Contraction of uterus during childbirth
- Blood clotting
- Sweating
Correct Answer

A. Sweating

Explanation

Sweating is not in itself maintaining homeostasis because it is a response to an existing imbalance in the body's temperature. Sweating helps regulate body temperature by cooling the body down when it becomes too hot. However, homeostasis refers to the body's ability to maintain a stable internal environment, and sweating is a reactive process rather than a continuous regulatory mechanism.

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22.

What are generally muscles or glands and their actions can change the value of the condition in question back toward to the set point?
- Comparator
- Effectors
- Stimulators
- Neurons
Correct Answer

A. Effectors

Explanation

Effectors are generally muscles or glands that can change the value of the condition in question back toward the set point. They are responsible for carrying out the response or action that helps to restore the balance or equilibrium in the body. In this context, effectors play a crucial role in maintaining homeostasis by counteracting any changes and bringing the condition back to its optimal level.

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23.

Where is the nucleus found in the neuron?
- Cell body
- Axon
- Dendrites
Correct Answer

A. Cell body

Explanation

The nucleus is found in the cell body of a neuron. The cell body, also known as the soma, contains the nucleus along with other organelles necessary for the functioning of the neuron. The nucleus houses the genetic material of the cell and controls the cell's activities by regulating gene expression.

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24.

What developes first in the chordata phylm ?
- Mouth
- Anus
Correct Answer

A. Anus

Explanation

In chordates, the anus develops first. Chordates are characterized by the presence of a notochord, a hollow nerve cord, and pharyngeal slits. During embryonic development, the anus forms before the mouth. This is because the blastopore, which is the opening of the developing digestive system, eventually becomes the anus. The mouth, on the other hand, develops from a separate opening called the stomodeum. Therefore, in chordates, the anus is the first opening to form in the digestive system.

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25.

True or false , the porifera can only be bisected into equal halves in one plane
- True
- False
Correct Answer

A. False

Explanation

Porifera, commonly known as sponges, can be bisected into equal halves in multiple planes, not just one. This is because sponges have a flexible and asymmetrical body structure, allowing them to be divided into equal halves in various directions. Therefore, the statement that porifera can only be bisected into equal halves in one plane is false.

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26.

What is the single extension of cytoplasm that conducts impulses away from the body?
- Cell body
- Dendrites
- Axon
- Synapses cleft
Correct Answer

A. Axon

Explanation

The axon is a single extension of the cytoplasm that conducts impulses away from the cell body. It is responsible for transmitting electrical signals, called action potentials, to other neurons or target cells. Unlike dendrites, which receive signals, the axon carries the signals away from the cell body. The synapse cleft is the small gap between neurons where neurotransmitters are released, and it is not an extension of the cytoplasm. Therefore, the correct answer is axon.

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27.

The membrane of a resting neuron is much more permeable to what ion?
- Potassium
- Sodium
- Floride
- Iodine
Correct Answer

A. Potassium

Explanation

The resting membrane potential of a neuron is primarily determined by the permeability of the membrane to different ions. In a resting neuron, the membrane is more permeable to potassium ions compared to other ions such as sodium, fluoride, or iodine. This is because the neuron has a higher number of potassium channels that are open, allowing potassium ions to move more freely across the membrane. As a result, potassium ions play a crucial role in establishing and maintaining the resting membrane potential of a neuron.

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28.

What transmits impulses percieved as pain?
- Cutaneous receptors
- Nociceptors
- Myline sheaths
- Neurotransmitters
Correct Answer

A. Nociceptors

Explanation

Nociceptors are sensory receptors that transmit impulses perceived as pain. These specialized nerve endings are found throughout the body, particularly in the skin, muscles, and internal organs. When there is tissue damage or potential harm, nociceptors detect and respond to harmful stimuli such as heat, pressure, or chemicals. They then send signals to the brain, which interprets these signals as pain. Nociceptors play a crucial role in alerting the body to potential danger and initiating protective responses.

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29.

The saccule, utricle and semicircular canals are all structures that make up what?
- Transmission
- Ganglion cells
- Gravity receptors
- Vestibular apparatus
Correct Answer

A. Vestibular apparatus

Explanation

The saccule, utricle, and semicircular canals are structures that make up the vestibular apparatus. The vestibular apparatus is responsible for detecting changes in head position and movement, and plays a crucial role in maintaining balance and spatial orientation. It contains sensory receptors that detect the force of gravity and the acceleration of head movements, allowing us to perceive our position in relation to our surroundings.

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30.

What uses metabolism to generate body heat and maintain temperatures above ambient temperatures?
- Homeotherms
- Heterotherms
- Ectotherms
- Poikilotherms
- Endotherms
Correct Answer

A. Endotherms

Explanation

Endotherms use metabolism to generate body heat and maintain temperatures above ambient temperatures. Unlike ectotherms, which rely on external sources of heat, endotherms can regulate their body temperature internally. This is achieved through the metabolic process, which involves the production of heat as a byproduct. Endotherms have a higher metabolic rate compared to ectotherms, allowing them to generate and maintain their own body heat, regardless of the surrounding temperature. This adaptation enables endotherms to thrive in a wide range of environments and climates.

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31.

What provides homeostasis for the organisms?
- Positive feedback
- Internal factors
- Negative feedback
- Nervous tissues
Correct Answer

A. Negative feedback

Explanation

Negative feedback provides homeostasis for organisms by counteracting any changes or imbalances in the internal environment. When a deviation from the set point occurs, negative feedback mechanisms work to bring the system back to its normal state. This is achieved by detecting the change and initiating responses that oppose or reverse the deviation. For example, if body temperature rises above the set point, negative feedback mechanisms will trigger responses such as sweating and vasodilation to cool the body down and restore the normal temperature.

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32.

Groups of cells that are similar in structure and function are organized into what?
- Tissues
- Organs
- Organ systems
- Mesoderm tissue
- Organelles
Correct Answer

A. Tissues

Explanation

In biology, groups of cells that are similar in structure and function are organized into tissues. Tissues are composed of specialized cells that work together to perform specific functions. They can be found in various parts of the body and are responsible for carrying out specific tasks, such as muscle contraction, nutrient absorption, or hormone production. Tissues are the building blocks of organs and organ systems, which are higher levels of organization in the body. Therefore, tissues is the correct answer in this context.

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33.

A protostome has what kind of cleavage?
- Radial
- Spiral
- Radical
Correct Answer

A. Spiral

Explanation

A protostome has spiral cleavage. This type of cleavage is characterized by the spiral arrangement of the cells during early embryonic development. The cells divide at oblique angles to each other, resulting in a spiral pattern. This pattern is important for the subsequent formation of the body plan in protostomes, as it determines the positioning of the cells and their fate in the developing embryo.

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34.

What type of body plan has no body cavity because the space between the mesoderm and the endoderm is filled with cells and organic material?
- Psedocoelomates
- Coelomates
- Protostomes
- Acoelomates
Correct Answer

A. Acoelomates

Explanation

Acoelomates have no body cavity because the space between the mesoderm and the endoderm is filled with cells and organic material. This means that their organs are directly embedded within the mesoderm, without a fluid-filled cavity surrounding them. This body plan is characteristic of flatworms and other simple organisms.

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35.

A body plan consists of what potions of the body?
- Dorsal and posterior
- Ventral and dorsal
- Ventral and posterior
- Frontal and transverse
- All
Correct Answer

A. All

Explanation

The correct answer is "all" because a body plan consists of all the mentioned portions of the body, which are dorsal, posterior, ventral, frontal, and transverse. These terms refer to different anatomical directions and orientations in the body. The dorsal portion is the back side, the ventral portion is the front side, the posterior portion is the rear side, the frontal portion is the front side, and the transverse portion is the horizontal plane dividing the body into upper and lower sections. Therefore, all of these portions are included in a body plan.

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36.

What changes in membrane potential?
- Graded potential
- Action potential
Correct Answer

A. Graded potential

Explanation

Graded potentials refer to changes in the membrane potential that vary in amplitude and can either be depolarizing or hyperpolarizing. These changes are caused by the opening or closing of ion channels in response to stimuli. On the other hand, action potentials are brief, rapid, and uniform electrical impulses that occur when a certain threshold is reached in the membrane potential. They are characterized by depolarization followed by repolarization and are essential for transmitting signals along neurons.

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37.

What is the resting potential of a cell?
- 70mV
- -144Mv
- -70mV
- 17Mv
- -77Mv
Correct Answer

A. -70mV

Explanation

The resting potential of a cell refers to the electrical charge difference across the cell membrane when the cell is at rest or not actively transmitting signals. This potential is typically around -70mV, meaning the inside of the cell is negatively charged relative to the outside. This negative resting potential is maintained by the selective permeability of the cell membrane to ions and the action of ion channels and pumps.

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38.

What creates a type of insulation around the neuron, allowing the neuron to use salutatory conduction which is faster?
- Coelomates
- Myelin sheath
- Nociceptors
Correct Answer

A. Myelin sheath

Explanation

The myelin sheath is a protective layer that wraps around the axon of a neuron, creating insulation. This insulation allows for saltatory conduction, a process in which the electrical signal jumps from one node of Ranvier to another, significantly increasing the speed of signal transmission. Therefore, the myelin sheath enables faster conduction of nerve impulses, enhancing the efficiency of neuronal communication.

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39.

In the vertebrate eye, the light is focused on what structures?
- Pupil
- Fovea/retina
- Cornea
- Iris
- Sclera
Correct Answer

A. Fovea/retina

Explanation

The correct answer is fovea/retina. The fovea is a small depression in the retina where the light is focused. The retina is a layer of tissue at the back of the eye that contains light-sensitive cells called photoreceptors. These structures work together to capture and process light, allowing us to see. The pupil, cornea, iris, and sclera are also important parts of the eye, but they do not directly focus the light onto the retina.

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40.

The expanding and contracting opening in the eye's iris, through which light passes to the retina, is what part of the eye?
- Lens
- Fovea
- Pupil
- Cornea
Correct Answer

A. Pupil

Explanation

The correct answer is pupil. The pupil is the expanding and contracting opening in the eye's iris that allows light to pass through to the retina. It controls the amount of light entering the eye by dilating or constricting in response to the brightness of the surroundings. The lens, fovea, and cornea are all other parts of the eye, but they do not specifically refer to the expanding and contracting opening.

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41.

The small roadless area of the retina that affords cute vision is what part of the eye?
- Iris
- Fovea
- Pupil
- Lens
- Sclera
Correct Answer

A. Fovea

Explanation

The fovea is the small roadless area of the retina that affords cute vision. It is responsible for sharp central vision and contains a high concentration of cone cells, which are responsible for color vision and visual acuity. The fovea is located at the center of the macula, which is the central part of the retina.

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42.

The photosensitive layer of the eye that contains several layers of neurons and light receptors receives the images formed by the lens and transmits it to the brain via the optic nerve.
- Retina
- Pupil
- Lens
- Fovea
- Iris
Correct Answer

A. Retina

Explanation

The retina is the photosensitive layer of the eye that contains several layers of neurons and light receptors. It receives the images formed by the lens and transmits them to the brain via the optic nerve. The retina plays a crucial role in the process of vision by converting light into electrical signals that the brain can interpret.

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43.

Positive feedback does not help themselves in homeostasis, true or false?
- True
- False
Correct Answer

A. True

Explanation

Positive feedback does not help in homeostasis. Homeostasis is the body's ability to maintain a stable internal environment. Positive feedback amplifies a response, moving the body away from its original state, which is opposite to the goal of maintaining stability. Therefore, positive feedback does not contribute to homeostasis.

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44.

What tissue connects the brain and spinal cord to the heart and helps regulate the heartbeat?
- Smooth
- Connective
- Muscle
- Nervous
- Cardiac
Correct Answer

A. Nervous

Explanation

The tissue that connects the brain and spinal cord to the heart and helps regulate the heartbeat is nervous tissue. Nervous tissue is responsible for transmitting signals and impulses throughout the body, including the coordination of heart rate and rhythm. It contains specialized cells called neurons that can receive, process, and transmit information, allowing for the regulation of various bodily functions, including the heartbeat.

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45.

Which of the four is not a germ layer tissue?
- Epithelial
- Mesoderm
- Ectoderm
- Endoderm
Correct Answer

A. Epithelial

Explanation

Epithelial tissue is not a germ layer tissue. The germ layers are the three primary layers of cells that form during embryonic development: ectoderm, mesoderm, and endoderm. These germ layers give rise to all the different types of tissues in the body, including epithelial tissue. Therefore, epithelial tissue cannot be considered a germ layer tissue.

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46.

What are the four levels of organization in the vertebrate body?
- Tissues,cells,organs,organ systems
- Organs,tissues,organ systems, cells
- Cells,tissues,organs,organ systems
- Cells,organs, tiissues, organ systems
Correct Answer

A. Cells,tissues,organs,organ systems

Explanation

The correct answer is cells, tissues, organs, and organ systems. This order represents the hierarchical organization of the vertebrate body. Cells are the basic building blocks of all living organisms. Tissues are groups of similar cells that work together to perform a specific function. Organs are composed of different types of tissues and have specialized functions. Organ systems are groups of organs that work together to perform a specific function for the entire organism.

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47.

How many different cell types do humans have?
- 220
- 210
- 200
- 150
Correct Answer

A. 210

Explanation

Humans have approximately 210 different cell types. This includes various types of cells such as muscle cells, nerve cells, blood cells, skin cells, and many more. Each type of cell has a specific structure and function, contributing to the overall complexity and functionality of the human body.

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48.

Which of the following is not a primary tissue?
- Endodermal
- Thermal
- Mesoderm
- Ectoderm
Correct Answer

A. Thermal

Explanation

The term "thermal" does not refer to a primary tissue. The other options, endodermal, mesoderm, and ectoderm, are all primary tissues that are involved in the development of different organs and systems in the body. "Thermal" is not a term used to describe a specific tissue type.

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49.

The digestive organs and intestines develop from what germ layer?
- Endoderm
- Ectoderm
- Mesdermin
Correct Answer

A. Endoderm

Explanation

During embryonic development, the digestive organs and intestines are formed from the endoderm germ layer. The endoderm is one of the three primary germ layers that give rise to different tissues and organs in the body. It is the innermost layer and gives rise to the lining of the digestive tract, including the stomach, small intestine, and large intestine. Additionally, it also gives rise to other organs such as the liver, pancreas, and lungs. The endoderm plays a crucial role in the development of the digestive system, making it the correct answer in this case.

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Quiz Edited by
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Apr 27, 2010

Quiz Created by
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Quiz Preview

The ventral cavity is divided into what two cavities?

Which of these is not apart of the coelom

The ectoderm gives rise to what?

The other coverings of the body and nervous system develop from what "germ layer"

The muscle forms from what type of tissue "germ layer"?

Which germ layer gives rise to the lining of GI tract?

Deuterosomes show patterns of what type of cleavage

What is the most evolved phylum with three germ layers?

What is an example of a pseudocoelomate?

The traditional classification had animals classified into how many different phyla?

True of false a porifera has no symmetry?

What type of evidence is different from the traditional classification of animals as opposed to the modern classification?

What type of synapses are the vast majority of synapses in vertebrate?

Nerve impulses travel along the long cellular extension of the neuron called the?

_______ is an impulse in a neuron taking the form of a wave of depolarization or hyperpolarization imposed on a polarized cell surface.

_____ produce myelin in the PNS.

What is the sequential order by which sensory information is conveyed to the CNS?

What structure does not make up the vestibular apparatus?

True or false, poikilotherms allow their body temperature to conform to their environment?

Which of the following is not in themselves maintain homeostasis?

What are generally muscles or glands and their actions can change the value of the condition in question back toward to the set point?

Where is the nucleus found in the neuron?

What developes first in the chordata phylm ?

True or false , the porifera can only be bisected into equal halves in one plane

What is the single extension of cytoplasm that conducts impulses away from the body?

The membrane of a resting neuron is much more permeable to what ion?

What transmits impulses percieved as pain?

The saccule, utricle and semicircular canals are all structures that make up what?

What uses metabolism to generate body heat and maintain temperatures above ambient temperatures?

What provides homeostasis for the organisms?

Groups of cells that are similar in structure and function are organized into what?

A protostome has what kind of cleavage?

What type of body plan has no body cavity because the space between the mesoderm and the endoderm is filled with cells and organic material?

A body plan consists of what potions of the body?

What changes in membrane potential?

What is the resting potential of a cell?

What creates a type of insulation around the neuron, allowing the neuron to use salutatory conduction which is faster?

In the vertebrate eye, the light is focused on what structures?

The expanding and contracting opening in the eye's iris, through which light passes to the retina, is what part of the eye?

The small roadless area of the retina that affords cute vision is what part of the eye?

The photosensitive layer of the eye that contains several layers of neurons and light receptors receives the images formed by the lens and transmits it to the brain via the optic nerve.

Positive feedback does not help themselves in homeostasis, true or false?

What tissue connects the brain and spinal cord to the heart and helps regulate the heartbeat?

Which of the four is not a germ layer tissue?

What are the four levels of organization in the vertebrate body?

How many different cell types do humans have?

Which of the following is not a primary tissue?

The digestive organs and intestines develop from what germ layer?