Question 1

Each neuron in the CNS may receive input from

Accepted Answer

A)   only one synaptic knob.
B)   one synaptic knob at each end.
C)   about 10 dendrites.
D)   thousands of axons.

Question 2

Sensory receptors are part of the CNS.

Accepted Answer

A) True 
 B)False

Question 3

Viagra is a drug used to treat erectile dysfunction by dilating arteries in the penis. The neurotransmitter that Viagra affects is

Accepted Answer

A)   acetylcholine.
B)   nitric oxide.
C)   serotonin.
D)   histamine.

Question 4

An impulse conducted along an axon consists of a wave of ______ ______ moving away from a point of stimulation.

Accepted Answer

The answer of An impulse conducted along an axon consists...

Question 5

_________ support the axon from within.

Accepted Answer

A)   Dendrites.
B)   Nodes of Ranvier.
C)   Neurofibrils.
D)   Collaterals.

Question 6

Sheaths of ______ cells often enclose the larger axons outside of the brain and spinal cord.

Accepted Answer

The answer of Sheaths of ______ cells often enclose the...

Question 7

The two types of cells of the nervous system are

Accepted Answer

A)   axons and dendrites.
B)   neurons and neuroglia.
C)   motor neurons and sensory neurons.
D)   Schwann cells and microglia.

Question 8

Neural stem cells can be harvested from autopsies and stored, alive, in banks, whereas neurons cannot, because

Accepted Answer

A)   people do not will them to science.
B)   neural stem cells have lower oxygen and energy requirements than neurons.
C)   neural stem cells have higher oxygen and energy requirements than neurons.
D)   neural stem cells have more globular shapes than neurons.

Question 9

Astrocytes structurally support neurons and also provide important signals and nutrients to neurons.

Accepted Answer

A) True 
 B)False

Question 10

A myelinated nerve fiber is ______, whereas an unmyelinated nerve fiber is ______.

Accepted Answer

A)   gray, and composing the gray matter of the brain and spinal cord; white, and composing the white matter of the brain and spinal cord
B)   white, and composing the gray matter of the brain and spinal cord; gray, and composing the white matter of the brain and spinal cord
C)   white, and composing the white matter of the brain and spinal cord; gray, and composing the gray matter of the brain and spinal cord
D)   white, and composing the gray matter of the brain and spinal cord; red, and composing the white matter of the brain and spinal cord

Question 11

Synaptic knobs are at the ends of

Accepted Answer

A)   axons.
B)   dendrites.
C)   cell bodies.
D)   neuroglia.

Question 12

Clusters of neuron cell bodies in the PNS are called _____.

Accepted Answer

A)   neuromas
B)   axons
C)   ganglia
D)   nuclei

Question 13

Convergence refers to

Accepted Answer

A)   dendrites from neurons in different parts of the nervous system contacting the same neuron.
B)   axons from neurons in different parts of the nervous system contacting the same neuron.
C)   dendrites from the same neuron touching each other.
D)   a neuroglial cell that contacts many neurons.

Question 14

Which cells produce myelin in the brain and spinal cord?

Accepted Answer

A)   Schwann cells
B)   Astrocytes
C)   Microglia
D)   Oligodendrocytes

Question 15

Neurons that conduct impulses from the CNS to muscles or glands are

Accepted Answer

A)   sensory neurons.
B)   interneurons.
C)   motor neurons.
D)   unipolar neurons.

Question 16

A drug that functions as an agonist

Accepted Answer

A)   activates a receptor, helping a neurotransmitter bind or triggering an action potential in some other way.
B)   causes great pain if taken in too high a dose.
C)   blocks a receptor so that the neurotransmitter cannot bind.
D)   relieves pain.

Question 17

An action potential is triggered if

Accepted Answer

A)   EPSPs overpower IPSPs.
B)   IPSPs overpower EPSPs.
C)   chloride channels open.
D)   the membrane hyperpolarizes.

Question 18

Which of the following is(are)  a type of neuroglia?

Accepted Answer

A)   Astrocyte
B)   Oligodendrocyte
C)   Schwann cell
D)   All of the above

Question 19

When an action potential passes over the surface of a synaptic knob, the contents of the vesicles are released in response to the presence of

Accepted Answer

A)   calcium ions.
B)   sodium ions.
C)   neurotransmitters.
D)   neuropeptides.

Question 20

Drugs that increase the actions of norepinephrine and/or serotonin by keeping them in synapses longer are most likely used to treat

Accepted Answer

A)   multiple sclerosis.
B)   Tay-Sachs disease.
C)   clinical depression.
D)   erectile dysfunction.

Exam 10: Nervous System I: Basic Structure and Function

Clusters of neuron cell bodies in the PNS are called _____.

Correct AnswerverifiedShow Answer

Neurons that conduct impulses from the CNS to muscles or glands are

Correct AnswerverifiedShow Answer

A drug that functions as an agonist

Correct AnswerverifiedShow Answer

An impulse conducted along an axon consists of a wave of ______ ______ moving away from a point of stimulation.

Correct AnswerverifiedShow Answer

A myelinated nerve fiber is ______, whereas an unmyelinated nerve fiber is ______.

Correct AnswerverifiedShow Answer

Viagra is a drug used to treat erectile dysfunction by dilating arteries in the penis. The neurotransmitter that Viagra affects is

Correct AnswerverifiedShow Answer

Convergence refers to

Correct AnswerverifiedShow Answer

An action potential is triggered if

Correct AnswerverifiedShow Answer

Synaptic knobs are at the ends of

Correct AnswerverifiedShow Answer

Sheaths of ______ cells often enclose the larger axons outside of the brain and spinal cord.

Correct AnswerverifiedShow Answer

Which cells produce myelin in the brain and spinal cord?

Correct AnswerverifiedShow Answer

Drugs that increase the actions of norepinephrine and/or serotonin by keeping them in synapses longer are most likely used to treat

Correct AnswerverifiedShow Answer

Each neuron in the CNS may receive input from

Correct AnswerverifiedShow Answer

Sensory receptors are part of the CNS.

Correct AnswerverifiedShow Answer

When an action potential passes over the surface of a synaptic knob, the contents of the vesicles are released in response to the presence of

Correct AnswerverifiedShow Answer

The two types of cells of the nervous system are

Correct AnswerverifiedShow Answer

Which of the following is(are) a type of neuroglia?

Correct AnswerverifiedShow Answer

Astrocytes structurally support neurons and also provide important signals and nutrients to neurons.

Correct AnswerverifiedShow Answer

_________ support the axon from within.

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Neural stem cells can be harvested from autopsies and stored, alive, in banks, whereas neurons cannot, because

Correct AnswerverifiedShow Answer

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An impulse conducted along an axon consists of a wave of moving away from a point of stimulation.

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A myelinated nerve fiber is , whereas an unmyelinated nerve fiber is .

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