Question 1

If a resting potential becomes more negative,the membrane is

Accepted Answer

A)  depolarized.
B)  hyperpolarized.
C)  repolarized.
D)  summateD.

Question 2

Which of the following cells is only found in the PNS?

Accepted Answer

A)  Oligodendrocyte
B)  Astrocyte
C)  Microglial cell
D)  Schwann cell D

Question 3

Neurotransmitters that are modified amino acids are

Accepted Answer

A)  dopamine,serotonin,epinephrine,and norepinephrine.
B)  enkephalins,endorphins,and substance P.
C)  aspartic acid,glutamic acid,glycine,and GABA.
D)  potassium,sodium,and calcium ions

Question 4

Which of the following neuroglia are not part of the CNS?

Accepted Answer

A)  Ependymal cells
B)  Astrocytes
C)  Satellite cells
D)  Microglia C

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

Several nerve fibers converging onto one neuron amplifies impulses.

Accepted Answer

A) True 
 B)False

Question 7

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

Accepted Answer

Schwann

Question 8

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 9

Diverging axons amplify an impulse by

Accepted Answer

A)  contacting many neurons.
B)  returning the impulse to the neuron of origin.
C)  splitting into multiple axons.
D)  stimulating themselves.

Question 10

Because the response of a nerve fiber is all-or-none,a greater intensity of stimulus does not produce a stronger impulse.

Accepted Answer

A) True 
 B)False

Question 11

Sensory receptors are part of the CNS.

Accepted Answer

A) True 
 B)False

Question 12

The types of neurons that are organized into neuronal pools are

Accepted Answer

A)  interneurons.
B)  intraneurons.
C)  Schwann cells.
D)  astrocytes.

Question 13

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 14

A reason that the axons in the CNS and PNS differ in their ability to regenerate after injury is that

Accepted Answer

A)  axons of the CNS lack myelin.
B)  axons of the CNS lack neurilemmae.
C)  peripheral nerves lack Schwann cells.
D)  peripheral nerves lack endoneurium.

Question 15

Myelin is composed largely of carbohydrates.

Accepted Answer

A) True 
 B)False

Question 16

The brain and spinal cord comprise the central nervous system.

Accepted Answer

A) True 
 B)False

Question 17

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 18

Presynaptic neurons release neurotransmitters by ______________.

Accepted Answer

A)  endocytosis.
B)  exocytosis.
C)  diffusion.
D)  active transport.

Question 19

Which of the following is unique to neurons?

Accepted Answer

A)  Golgi apparatus
B)  Chromatophilic substance
C)  Mitochondrion
D)  Lysosome

Question 20

Myelin

Accepted Answer

A)  is released from a neuron and travels to another neuron.
B)  consists of layers of lipids and proteins that wrap around an axon.
C)  is produced in response to bacterial infection.
D)  is a form of chromatophilic substance that fills Schwann cells.

Exam 10: Nervous System I

If a resting potential becomes more negative,the membrane is

Correct AnswerverifiedShow Answer

Which of the following cells is only found in the PNS?

Correct AnswerverifiedD

Neurotransmitters that are modified amino acids are

Correct AnswerverifiedShow Answer

Which of the following neuroglia are not part of the CNS?

Correct AnswerverifiedC

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

Correct AnswerverifiedShow Answer

Several nerve fibers converging onto one neuron amplifies impulses.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedSchwann

The two types of cells of the nervous system are

Correct AnswerverifiedShow Answer

Diverging axons amplify an impulse by

Correct AnswerverifiedShow Answer

Because the response of a nerve fiber is all-or-none,a greater intensity of stimulus does not produce a stronger impulse.

Correct AnswerverifiedShow Answer

Sensory receptors are part of the CNS.

Correct AnswerverifiedShow Answer

The types of neurons that are organized into neuronal pools are

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

A reason that the axons in the CNS and PNS differ in their ability to regenerate after injury is that

Correct AnswerverifiedShow Answer

Myelin is composed largely of carbohydrates.

Correct AnswerverifiedShow Answer

The brain and spinal cord comprise the central nervous system.

Correct AnswerverifiedShow Answer

A drug that functions as an agonist

Correct AnswerverifiedShow Answer

Presynaptic neurons release neurotransmitters by ______________.

Correct AnswerverifiedShow Answer

Which of the following is unique to neurons?

Correct AnswerverifiedShow Answer

Myelin

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D

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C

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Schwann

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