Question 1

Axons terminate in a series of fine extensions known as

Accepted Answer

A)   synapses.
B)   dendrites.
C)   telodendria.
D)   knobs.
E)   collaterals.

Question 2

The cytoskeleton of the perikaryon contains which of the following?

Accepted Answer

A)   neurofibrils
B)   neurotubules
C)   neurofilaments
D)   B and C only
E)   A, B, and C

Question 3

Most CNS neurons lack centrioles. This observation explains

Accepted Answer

A)   why CNS neurons grow such long axons.
B)   why CNS neurons cannot regenerate.
C)   the ability of neurons to communicate with each other.
D)   the ability of neurons to produce a resting potential.
E)   the ability of neurons to generate an action potential.

Question 4

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

Accepted Answer

A)   somatic.
B)   efferent.
C)   motor.
D)   autonomic.
E)   afferent.

Question 5

Figure 11- 2 The Nerve Action Potential
Use Figure 11- 2 to answer the following questions:
-Neurotransmitter for release is stored in synaptic

Accepted Answer

A)   neurosomes.
B)   knobs.
C)   telodendria.
D)   vesicles.
E)   mitochondria.

Question 6

Type ______ fibers have the largest diameter axons.

Accepted Answer

A)   C
B)   F
C)   A
D)   B
E)   S

Question 7

The period during which an excitable membrane cannot respond to further stimulation is the_____________ .

Accepted Answer

absolute r...

Question 8

How does blocking retrograde axoplasmic transport in an axon affect the activity of a neuron?

Accepted Answer

A)   The neuron becomes unable to produce neurotransmitters.
B)   The soma becomes unable to export products to the synaptic knobs.
C)   The neuron becomes unable to produce action potentials.
D)   The neuron becomes unable to depolarize when stimulated.
E)   The soma becomes unable to respond to changes in the distal end of the axon.

Question 9

__________-neurons are small and have no anatomical features that distinguish dendrites from axons.

Accepted Answer

A)   Multipolar
B)   Anaxonic
C)   Bipolar
D)   Unipolar
E)   none of the above

Question 10

The buildup of depolarization when EPSPs arrive in rapid succession is called__________summation.

Accepted Answer

The answer of The buildup of depolarization when EPSPs arrive...

Question 11

A shift of the resting transmembrane potential toward 0 mV is called__________

Accepted Answer

The answer of A shift of the resting transmembrane potential...

Question 12

The smallest neuroglia of the CNS are the

Accepted Answer

A)   oligodendrocytes.
B)   ependymal cells.
C)   microglia.
D)   astrocytes.
E)   none of the above

Question 13

Which of the following are a type of glial cell found in the peripheral nervous system?

Accepted Answer

A)   satellite cells
B)   oligodendrocytes
C)   ependymal cells
D)   astrocytes
E)   microglia

Question 14

Figure 11- 1 The Neuron
Use Figure 11- 1 to answer the following questions:
-The site of intercellular communication between neurons is the

Accepted Answer

A)   synapse.
B)   telodendria.
C)   hillock.
D)   synaptic knob.
E)   collateral.

Question 15

Opioids relieve pain by blocking the release of

Accepted Answer

A)   substance Q.
B)   substance X.
C)   substance O.
D)   substance P.
E)   none of the above

Question 16

If the potassium permeability of a resting neuron increases above the resting permeability, what effect will this have on the transmembrane potential?

Accepted Answer

A)   The inside of the membrane will become more positive.
B)   The membrane will become depolarized.
C)   There will be almost no effect on transmembrane potential.
D)   The inside of the membrane will become more negative.
E)   both B and D

Question 17

In which of the following would the rate of impulse conduction be the greatest?

Accepted Answer

A)   a nonmyelinated fiber of 10- µm diameter
B)   a myelinated fiber of 1- µm diameter
C)   a nonmyelinated fiber of 20- µm diameter
D)   a myelinated fiber of 10- µm diameter
E)   the same in all because of the all- or- none principle

Question 18

The ______nervous system controls the skeletal muscles.

Accepted Answer

A)   autonomic
B)   sympathetic
C)   somatic
D)   afferent
E)   parasympathetic

Question 19

The____________ division carries motor commands to muscles and glands

Accepted Answer

The answer of The____________ division carries motor commands to muscles...

Question 20

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

Exam 11: Neural Tissue

The smallest neuroglia of the CNS are the

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Type ______ fibers have the largest diameter axons.

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If the potassium permeability of a resting neuron increases above the resting permeability, what effect will this have on the transmembrane potential?

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__________-neurons are small and have no anatomical features that distinguish dendrites from axons.

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The____________ division carries motor commands to muscles and glands

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In which of the following would the rate of impulse conduction be the greatest?

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How does blocking retrograde axoplasmic transport in an axon affect the activity of a neuron?

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Opioids relieve pain by blocking the release of

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The period during which an excitable membrane cannot respond to further stimulation is the_____________ .

Correct Answerverifiedabsolute r...View AnswerShow Answer

The ______nervous system controls the skeletal muscles.

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Figure 11- 1 The Neuron Use Figure 11- 1 to answer the following questions: -The site of intercellular communication between neurons is the

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Which of the following are a type of glial cell found in the peripheral nervous system?

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Figure 11- 2 The Nerve Action Potential Use Figure 11- 2 to answer the following questions: -Neurotransmitter for release is stored in synaptic

Correct AnswerverifiedShow Answer

The buildup of depolarization when EPSPs arrive in rapid succession is called__________summation.

Correct AnswerverifiedShow Answer

The cytoskeleton of the perikaryon contains which of the following?

Correct AnswerverifiedShow Answer

Axons terminate in a series of fine extensions known as

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?

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Most CNS neurons lack centrioles. This observation explains

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

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A shift of the resting transmembrane potential toward 0 mV is called__________

Correct AnswerverifiedShow Answer

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