Question 1

Although severing a peripheral axon leads to some degeneration,the neurilemma remains largely intact.

Accepted Answer

A) True 
 B)False

Question 2

Fast axonal transport is

Accepted Answer

A)  passive and only occurs in the anterograde direction.
B)  passive and only occurs in the retrograde direction.
C)  active (requires ATP) and only occurs in the anterograde direction.
D)  active (requires ATP) and only occurs in the retrograde direction.
E)  active (requires ATP) and can occur in either the anterograde or retrograde direction.F) B) and C)
G) A) and E)

Question 3

Hyperpolarization of a neuron results from

Accepted Answer

A)  either the entry of an anion or the exit of a cation.
B)  the entry of any ion.
C)  either the entry of a cation or the exit of an anion.
D)  the entrance of either sodium or potassium.E) A) and B)
F) A) and C)

Question 4

In the CNS all axons are myelinated,but in the PNS some are myelinated and some are unmyelinated.

Accepted Answer

A) True 
 B)False

Question 5

Transmission of nerve impulses along myelinated axons requires more energy than transmission along unmyelinated axons.

Accepted Answer

A) True 
 B)False

Question 6

A nerve

Accepted Answer

A)  contains a single axon.
B)  is found only in the CNS.
C)  carries only sensory information.
D)  carries information only toward the PNS.
E)  is a cablelike bundle of parallel axons.F) None of the above
G) A) and B)

Question 7

The endoneurium is composed of

Accepted Answer

A)  dense regular connective tissue.
B)  simple squamous epithelium.
C)  dense irregular connective tissue.
D)  areolar connective tissue.
E)  pseudostratified nonkeratinized epithelium.F) C) and D)
G) A) and E)

Question 8

A bipolar neurons has

Accepted Answer

A)  two axons extending from the cell body.
B)  two dendrites extending from the cell body.
C)  one axon and one dendrite extending from the cell body.
D)  a single short process that extends from the cell body and then splits into a peripheral and a central branch.E) All of the above
F) A) and C)

Question 9

When a neurotransmitter causes the opening of chemically gated potassium channels on the postsynaptic cell,the postsynaptic potential that results is an

Accepted Answer

A)  EPSP,which is a depolarization.
B)  EPSP,which is a hyperpolarization
C)  IPSP,which is a depolarization.
D)  IPSP,which is a hyperpolarization.E) A) and C)
F) All of the above

Question 10

The periphery of a myelinating neurolemmocyte that contains its cytoplasm and nucleus is called the _________.

Accepted Answer

The answer of The periphery of a myelinating neurolemmocyte that...

Question 11

Glial cells help maintain the structure of synapses and they can modify neural transmission.

Accepted Answer

A) True 
 B)False

Question 12

Continuous conduction of a nerve impulse occurs only along

Accepted Answer

A)  myelinated axons.
B)  dendrites.
C)  unmyelinated axons.
D)  axons in the PNS.
E)  axons in the CNS.F) A) and E)
G) A) and B)

Question 13

The glossy-white appearance of most axons is due to

Accepted Answer

A)  the high lipid content of the myelin sheath.
B)  their proximity to light-reflecting cartilage.
C)  their proximity to white bone.
D)  the white color of the perivascular feet.
E)  the covering of ependymal cells.F) A) and E)
G) A) and D)

Question 14

Neural stem cells in the CNS

Accepted Answer

A)  have no known function.
B)  can only form glial cells.
C)  can form new neurons throughout the CNS.
D)  can form new neurons in only certain portions of the CNS such as the hippocampus.
E)  can migrate to the PNS as needed.F) B) and C)
G) A) and D)

Question 15

When a nerve impulse reaches the transmissive segment of a neuron,

Accepted Answer

A)  calcium is pumped into the neuron and neurotransmitter diffuses out through channels.
B)  calcium is released from the neuron along with neurotransmitter from synaptic vesicles.
C)  calcium diffuses into the neuron and neurotransmitter is released by exocytosis.
D)  calcium and neurotransmitter diffuse into the synaptic knob.
E)  calcium is immediately pumped out of the neuron and vesicles of neurotransmitter undergo phagocytosis.F) A) and C)
G) C) and D)

Question 16

A neuropeptide is a molecule that is synthesized from an amino acid by the removal of a carboxyl group and the addition of another small functional group such as an amine group.

Accepted Answer

A) True 
 B)False

Question 17

After an impulse,the __________ refractory period is the time when it is possible to initiate another impulse,but it requires a stronger than usual stimulus.

Accepted Answer

The answer of After an impulse,the __________ refractory period is...

Question 18

Voltage-gated potassium channels in a neuron's axon are triggered to open when membrane potential becomes more negative.

Accepted Answer

A) True 
 B)False

Question 19

Spinal nerves extend from the spinal cord,whereas ________ nerves extend from the brain.

Accepted Answer

The answer of Spinal nerves extend from the spinal cord,whereas...

Question 20

The portion of the nervous system that conducts impulses from the skin,joints,skeletal muscles,and special senses is the ___________ division.

Accepted Answer

A)  autonomic motor
B)  somatic sensory
C)  somatic motor
D)  visceral sensoryE) B) and C)
F) A) and B)

Exam 12: Nervous System: Nervous Tissue

The glossy-white appearance of most axons is due to

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A bipolar neurons has

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After an impulse,the __________ refractory period is the time when it is possible to initiate another impulse,but it requires a stronger than usual stimulus.

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In the CNS all axons are myelinated,but in the PNS some are myelinated and some are unmyelinated.

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Fast axonal transport is

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Continuous conduction of a nerve impulse occurs only along

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A nerve

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The portion of the nervous system that conducts impulses from the skin,joints,skeletal muscles,and special senses is the ___________ division.

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A neuropeptide is a molecule that is synthesized from an amino acid by the removal of a carboxyl group and the addition of another small functional group such as an amine group.

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When a nerve impulse reaches the transmissive segment of a neuron,

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Transmission of nerve impulses along myelinated axons requires more energy than transmission along unmyelinated axons.

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Although severing a peripheral axon leads to some degeneration,the neurilemma remains largely intact.

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When a neurotransmitter causes the opening of chemically gated potassium channels on the postsynaptic cell,the postsynaptic potential that results is an

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Neural stem cells in the CNS

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Spinal nerves extend from the spinal cord,whereas ________ nerves extend from the brain.

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The endoneurium is composed of

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Hyperpolarization of a neuron results from

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Voltage-gated potassium channels in a neuron's axon are triggered to open when membrane potential becomes more negative.

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Glial cells help maintain the structure of synapses and they can modify neural transmission.

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The periphery of a myelinating neurolemmocyte that contains its cytoplasm and nucleus is called the _________.

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