Question 1

Figure 12-2 The Nerve Action Potential
Use Figure 12-2 to answer the following questions:
-Which area of the graph shows when membrane potential approaches the potassium equilibrium potential?

Accepted Answer

A)  1
B)  2
C)  3
D)  4E) C) and D)
F) B) and C)

Question 2

Branches that may occur along an axon are called

Accepted Answer

A)  telodendria.
B)  synaptic terminals.
C)  collaterals.
D)  hillocks.
E)  synapses.F) A) and D)
G) A) and C)

Question 3

The part of the peripheral nervous system that carries sensory information to the CNS is designated

Accepted Answer

A)  motor.
B)  afferent.
C)  efferent.
D)  autonomic.
E)  somatic.F) A) and B)
G) All of the above

Question 4

The site in the neuron where EPSPs and IPSPs are integrated is the

Accepted Answer

A)  chemical synapse.
B)  electrical synapse.
C)  axon hillock.
D)  dendritic membrane.
E)  synaptic terminal.F) A) and B)
G) A) and E)

Question 5

A neuron that receives neurotransmitter from another neuron is called

Accepted Answer

A)  the presynaptic neuron.
B)  the motor neuron.
C)  an oligodendrocyte.
D)  a satellite cell.
E)  the postsynaptic neuron.F) A) and D)
G) C) and E)

Question 6

Axons terminate in a series of fine extensions known as

Accepted Answer

A)  telodendria.
B)  terminals.
C)  collaterals.
D)  dendrites.
E)  synapses.F) B) and C)
G) A) and B)

Question 7

If the chemically gated sodium channels in the postsynaptic membrane were completely blocked,

Accepted Answer

A)  synaptic transmission would fail.
B)  release of neurotransmitter would stop.
C)  smaller action potentials would result.
D)  the presynaptic membrane would be unable to reach threshold.
E)  the presynaptic neuron would release a different neurotransmitter.F) A) and E)
G) A) and D)

Question 8

________ monitor the digestive,respiratory,cardiovascular,urinary,and reproductive systems.

Accepted Answer

A)  Spinal nerves
B)  Unipolar neurons
C)  Internoceptors
D)  Exteroceptors
E)  ProprioceptorsF) A) and D)
G) B) and E)

Question 9

The most abundant class of neuron in the central nervous system is

Accepted Answer

A)  anaxonic.
B)  bipolar.
C)  multipolar.
D)  pseudopolar.
E)  unipolar.F) All of the above
G) B) and C)

Question 10

Deteriorating changes in the distal segment of an axon as a result of a break between it and the soma is called ________ degeneration.

Accepted Answer

A)  neural
B)  central
C)  peripheral
D)  Wallerian
E)  conductionF) None of the above
G) A) and E)

Question 11

A stimulus that changes a postsynaptic neuron's membrane from resting potential to -85 mV is a(n) ________ stimulus.

Accepted Answer

A)  excitatory
B)  depolarizing
C)  temporal
D)  saltatory
E)  inhibitoryF) B) and E)
G) A) and B)

Question 12

The minimum stimulus required to trigger an action potential is known as the

Accepted Answer

A)  threshold.
B)  all-or-none response.
C)  potential.
D)  incentive.
E)  summation.F) B) and D)
G) A) and D)

Question 13

Figure 12-1 The Neuron
Use Figure 12-1 to answer the following questions:
-What is contained inside the structure labeled "5"?

Accepted Answer

A)  neuroglia
B)  sodium ions
C)  acetylcholinesterase
D)  calcium ions
E)  neurotransmitter moleculesF) A) and B)
G) B) and E)

Question 14

Puffer fish poison blocks voltage-gated sodium channels like a cork.What effect would this neurotoxin have on the function of neurons?

Accepted Answer

A)  Neurons would depolarize more rapidly.
B)  Action potentials would lack a repolarization phase.
C)  The absolute refractory period would be shorter than normal.
D)  The axon would be unable to generate action potentials.
E)  None,because the chemically gated sodium channels would still function.F) None of the above
G) B) and E)

Question 15

Neuron cell bodies in the PNS are clustered together in masses called

Accepted Answer

A)  fibers.
B)  tracts.
C)  nerves.
D)  nuclei.
E)  ganglia.F) B) and D)
G) All of the above

Question 16

IPSPs (inhibitory postsynaptic potentials)

Accepted Answer

A)  are local depolarizations.
B)  are local hyperpolarizations.
C)  increase membrane permeability to sodium ions.
D)  block the efflux of potassium ions.
E)  block the efflux of calcium ions.F) A) and E)
G) B) and D)

Question 17

Figure 12-2 The Nerve Action Potential
Use Figure 12-2 to answer the following questions:
-When is the neuron in the refractory period?

Accepted Answer

A)  1
B)  2
C)  3
D)  4E) B) and C)
F) A) and C)

Question 18

Neurons that have one axon and one dendrite,with the soma in between,are called

Accepted Answer

A)  anaxonic.
B)  unipolar.
C)  bipolar.
D)  tripolar.
E)  multipolar.F) A) and B)
G) D) and E)

Question 19

A postsynaptic neuron will have an excitatory postsynaptic potential (EPSP) when

Accepted Answer

A)  chemically regulated potassium channels are open and potassium is diffusing out of the cell.
B)  more calcium ions than usual diffuse into the neuron.
C)  chemically regulated sodium channels are open and sodium is diffusing into the cell.
D)  the neuron is hyperpolarized.
E)  more potassium ions than usual diffuse out of the neuron.F) A) and B)
G) A) and C)

Question 20

The tiny gaps between adjacent Schwann cells are called

Accepted Answer

A)  neurillema.
B)  nodes of Ranvier.
C)  axolemma.
D)  terminals.
E)  vesicles.F) C) and D)
G) A) and B)

Exam 12: Neural Tissue

A stimulus that changes a postsynaptic neuron's membrane from resting potential to -85 mV is a(n) ________ stimulus.

Correct AnswerverifiedShow Answer

Figure 12-2 The Nerve Action Potential Use Figure 12-2 to answer the following questions: -When is the neuron in the refractory period?

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IPSPs (inhibitory postsynaptic potentials)

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The part of the peripheral nervous system that carries sensory information to the CNS is designated

Correct AnswerverifiedShow Answer

A postsynaptic neuron will have an excitatory postsynaptic potential (EPSP) when

Correct AnswerverifiedShow Answer

Neurons that have one axon and one dendrite,with the soma in between,are called

Correct AnswerverifiedShow Answer

Puffer fish poison blocks voltage-gated sodium channels like a cork.What effect would this neurotoxin have on the function of neurons?

Correct AnswerverifiedShow Answer

The site in the neuron where EPSPs and IPSPs are integrated is the

Correct AnswerverifiedShow Answer

Figure 12-1 The Neuron Use Figure 12-1 to answer the following questions: -What is contained inside the structure labeled "5"?

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Figure 12-2 The Nerve Action Potential Use Figure 12-2 to answer the following questions: -Which area of the graph shows when membrane potential approaches the potassium equilibrium potential?

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Axons terminate in a series of fine extensions known as

Correct AnswerverifiedShow Answer

________ monitor the digestive,respiratory,cardiovascular,urinary,and reproductive systems.

Correct AnswerverifiedShow Answer

The most abundant class of neuron in the central nervous system is

Correct AnswerverifiedShow Answer

The minimum stimulus required to trigger an action potential is known as the

Correct AnswerverifiedShow Answer

Deteriorating changes in the distal segment of an axon as a result of a break between it and the soma is called ________ degeneration.

Correct AnswerverifiedShow Answer

If the chemically gated sodium channels in the postsynaptic membrane were completely blocked,

Correct AnswerverifiedShow Answer

Neuron cell bodies in the PNS are clustered together in masses called

Correct AnswerverifiedShow Answer

The tiny gaps between adjacent Schwann cells are called

Correct AnswerverifiedShow Answer

Branches that may occur along an axon are called

Correct AnswerverifiedShow Answer

A neuron that receives neurotransmitter from another neuron is called

Correct AnswerverifiedShow Answer

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$Figure 12-2 The Nerve Action Potential Use Figure 12-2 to answer the following questions: -When is the neuron in the refractory period? A) 1 B) 2 C) 3 D) 4$ Figure 12-2 The Nerve Action Potential Use Figure 12-2 to answer the following questions: -When is the neuron in the refractory period?

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