Question 1

The types of neurons that are organized into neuronal pools are

Accepted Answer

A)   interneurons.
B)   intraneurons.
C)   Schwann cells.
D)   astrocytes.E) A) and D)
F) B) and C)

Question 2

A stimulus great enough to change the membrane potential and propagate an action potential is said to have reached _________.

Accepted Answer

A)   recruitment
B)   threshold
C)   summation
D)   tetanusE) B) and D)
F) B) and C)

Question 3

The most rapid conduction of an impulse along an axon occurs on a fiber that is

Accepted Answer

A)   thick and myelinated.
B)   thick and unmyelinated.
C)   thin and myelinated.
D)   thin and unmyelinated.E) None of the above
F) B) and D)

Question 4

During the absolute refractory period, a stimulus of high intensity may trigger a nerve impulse.

Accepted Answer

A) True 
 B)False

Question 5

An excitatory postsynaptic potential lasts for about

Accepted Answer

A)   15 minutes.
B)   15 seconds.
C)   15 milliseconds.
D)   15 microseconds.E) B) and D)
F) B) and C)

Question 6

Axon branches are called collaterals.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following molecules is responsible for "runner's high," a good feeling that accompanies long-distance running?

Accepted Answer

A)   Beta endorphin
B)   Acetylcholine
C)   Epinephrine
D)   DopamineE) B) and C)
F) None of the above

Question 8

A neuron may have

Accepted Answer

A)   one axon and many dendrites.
B)   one dendrite and many axons.
C)   no dendrites.
D)   no axons.E) A) and B)
F) A) and C) A

Question 9

An immune response that affects the myelin coating on axons throughout the spinal cord and brain, triggering inflammation and leaving scars, is

Accepted Answer

A)   muscular dystrophy.
B)   multiple sclerosis.
C)   Alzheimer disease.
D)   amyotrophic lateral sclerosis.E) A) and B)
F) All of the above

Question 10

Action potentials are related to impulses conducted along an axon in that

Accepted Answer

A)   many impulses are required to cause one action potential.
B)   active transport of Na+ and K+ are required for impulse conduction but not for an action potential.
C)   impulses are stronger responses than are action potentials.
D)   propagation of a series of action potentials along a nerve cell fiber constitutes an impulse.E) A) and B)
F) None of the above

Question 11

Marjorie takes an anti-anxiety drug so that she can sleep better and remain calm enough to study effectively. She begins by taking 25 milligrams every evening, but within a month this dose is no longer helping, so she takes two pills. After another month this dosage is no longer effective. This is happening because

Accepted Answer

A)   her immune system is rejecting the drug.
B)   she has developed tolerance, which means that her liver can no longer metabolize the drug, so it remains active for too long.
C)   the number of receptors to which the drug binds on neurons has declined.
D)   the number of receptors to which the drug binds on neurons has increased.E) None of the above
F) A) and D)

Question 12

Migraine results from

Accepted Answer

A)   release of calcitonin gene-related peptide from the trigeminal nerves at the base of the brain, in response to a spreading wave of excitation followed by lack of response from the cortex.
B)   not eating enough chocolate, which causes a spreading effect in the cortex.
C)   a neurotransmitter deficiency.
D)   release of an abnormal form of beta endorphin from the trigeminal nerves at the base of the brain, in response to cortical stimulation.E) A) and B)
F) None of the above

Question 13

A mixed nerve includes different neuroglial cells.

Accepted Answer

A) True 
 B)False

Question 14

Opiate drugs derived from poppies relieve pain in humans because the human nervous system has

Accepted Answer

A)   neurotransmitters.
B)   receptors for endogenous opiates.
C)   myelin.
D)   sodium and potassium membrane channels.E) B) and C)
F) C) and D)

Question 15

Neuroglia are specialized to react to environmental change, and neurons support neuroglia.

Accepted Answer

A) True 
 B)False

Question 16

Dendrites on unipolar neurons are parts of

Accepted Answer

A)   sensory neurons.
B)   motor neurons.
C)   interneurons.
D)   efferent neurons.E) All of the above
F) A) and B)

Question 17

A(n) ______ is the junction between neurons.

Accepted Answer

synapse

Question 18

Myelin is rich in ___________.

Accepted Answer

A)   nucleic acids
B)   carbohydrates
C)   lipids
D)   saltsE) A) and D)
F) All of the above

Question 19

The brain and spinal cord comprise the central nervous system.

Accepted Answer

A) True 
 B)False  True

Question 20

If a neuron receives a series of stimuli whose effect is excitatory but subthreshold, the neuron is more excitable to incoming stimulation than before and is said to be

Accepted Answer

A)   graded.
B)   amplified.
C)   facilitated.
D)   refractory.E) A) and B)
F) B) and C)

Exam 10: Nervous System I: Basic Structure and Function

The types of neurons that are organized into neuronal pools are

Correct Answer
verified

A stimulus great enough to change the membrane potential and propagate an action potential is said to have reached _________.

Correct Answer
verified

The most rapid conduction of an impulse along an axon occurs on a fiber that is

Correct Answer
verified

During the absolute refractory period, a stimulus of high intensity may trigger a nerve impulse.

Correct Answer
verified

An excitatory postsynaptic potential lasts for about

Correct Answer
verified

Axon branches are called collaterals.

Correct Answer
verified

Which of the following molecules is responsible for "runner's high," a good feeling that accompanies long-distance running?

Correct Answer
verified

A neuron may have

Correct Answer
verified
A

An immune response that affects the myelin coating on axons throughout the spinal cord and brain, triggering inflammation and leaving scars, is

Correct Answer
verified

Action potentials are related to impulses conducted along an axon in that

Correct Answer
verified

Correct Answer
verified

Migraine results from

Correct Answer
verified

A mixed nerve includes different neuroglial cells.

Correct Answer
verified

Opiate drugs derived from poppies relieve pain in humans because the human nervous system has

Correct Answer
verified

Neuroglia are specialized to react to environmental change, and neurons support neuroglia.

Correct Answer
verified

Dendrites on unipolar neurons are parts of

Correct Answer
verified

A(n) ______ is the junction between neurons.

Correct Answer
verified
synapse

Myelin is rich in ___________.

Correct Answer
verified

The brain and spinal cord comprise the central nervous system.

Correct Answer
verified
True

If a neuron receives a series of stimuli whose effect is excitatory but subthreshold, the neuron is more excitable to incoming stimulation than before and is said to be

Correct Answer
verified

Exam 10: Nervous System I: Basic Structure and Function

The types of neurons that are organized into neuronal pools are

Correct AnswerverifiedShow Answer

A stimulus great enough to change the membrane potential and propagate an action potential is said to have reached _________.

Correct AnswerverifiedShow Answer

The most rapid conduction of an impulse along an axon occurs on a fiber that is

Correct AnswerverifiedShow Answer

During the absolute refractory period, a stimulus of high intensity may trigger a nerve impulse.

Correct AnswerverifiedShow Answer

An excitatory postsynaptic potential lasts for about

Correct AnswerverifiedShow Answer

Axon branches are called collaterals.

Correct AnswerverifiedShow Answer

Which of the following molecules is responsible for "runner's high," a good feeling that accompanies long-distance running?

Correct AnswerverifiedShow Answer

A neuron may have

Correct AnswerverifiedA

An immune response that affects the myelin coating on axons throughout the spinal cord and brain, triggering inflammation and leaving scars, is

Correct AnswerverifiedShow Answer

Action potentials are related to impulses conducted along an axon in that

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Migraine results from

Correct AnswerverifiedShow Answer

A mixed nerve includes different neuroglial cells.

Correct AnswerverifiedShow Answer

Opiate drugs derived from poppies relieve pain in humans because the human nervous system has

Correct AnswerverifiedShow Answer

Neuroglia are specialized to react to environmental change, and neurons support neuroglia.

Correct AnswerverifiedShow Answer

Dendrites on unipolar neurons are parts of

Correct AnswerverifiedShow Answer

A(n) ______ is the junction between neurons.

Correct Answerverifiedsynapse

Myelin is rich in ___________.

Correct AnswerverifiedShow Answer

The brain and spinal cord comprise the central nervous system.

Correct AnswerverifiedTrue

If a neuron receives a series of stimuli whose effect is excitatory but subthreshold, the neuron is more excitable to incoming stimulation than before and is said to be

Correct AnswerverifiedShow Answer

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A

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synapse

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True

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