Question 1

A myelin sheath is composed primarily of __________.

Accepted Answer

A)  lipids
B)  carbohydrates
C)  glycoproteins
D)  proteins
E)  polysaccharidesF) A) and D)
G) All of the above

Question 2

What is another name for the autonomic nervous system?

Accepted Answer

A)  Visceral sensory division
B)  Somatic sensory division
C)  Visceral motor division
D)  Somatic motor division
E)  Central nervous systemF) B) and D)
G) A) and E)

Question 3

Which of these happens first in an cholinergic synaptic transmission?

Accepted Answer

A)  Acetylcholine diffuses across the synaptic cleft
B)  A postsynaptic potential is produced
C)  Sodium enters the postsynaptic cell
D)  The synaptic vesicles release acetylcholine
E)  Acetylcholine binds to ligand-regulated gatesF) B) and D)
G) A) and B)

Question 4

Which of the following will cause the plasma membrane to hyperpolarize when at its RMP?

Accepted Answer

A)  An inflow of sodium
B)  An inflow of potassium
C)  An inflow of calcium
D)  An inflow of chloride
E)  An outflow of chlorideF) D) and E)
G) B) and E)

Question 5

An action potential never occurs in dendrites.

Accepted Answer

A) True 
 B)False

Question 6

During the absolute refractory period which of the following is true?

Accepted Answer

A)  If a neuron reaches threshold, the action potential goes to completion.
B)  The neuron fires at its maximum voltage if a stimulus depolarizes the neuron to threshold.
C)  The signal grows weaker with distance.
D)  It is possible to trigger a new action potential, but only with an unusually strong stimulus.
E)  No stimulus of any strength will trigger a new action potential.F) A) and B)
G) B) and E)

Question 7

Which of these is an example of an EPSP in a typical neuron?

Accepted Answer

A)  A voltage change from 0 mV to +0.35 mV
B)  A voltage change from -70 mV to -69.5 mV
C)  A voltage change from -69.5 mV to -70 mV
D)  A voltage change from +35 mV to 0 mV
E)  A voltage change from -70 mV to -70.5 mVF) C) and D)
G) B) and C)

Question 8

Some antidepressant drugs act by inhibiting monoamine oxidase (MAO) .What is the function of this enzyme?

Accepted Answer

A)  It binds to chloride gates.
B)  It breaks down monoamines.
C)  It blocks sodium channels.
D)  It converts ATP to cyclic AMP.
E)  It degrades acetylcholine.F) B) and E)
G) B) and C)

Question 9

Where does saltatory conduction occur?

Accepted Answer

A)  From node to node in myelinated fibers
B)  From node to node in unmyelinated fibers
C)  Down the entire length of a myelinated fiber
D)  Down the entire length of an unmyelinated fiberE) A) and B)
F) A) and C)

Question 10

What occurs during hyperpolarization of a neuron membrane?

Accepted Answer

A)  Sodium ions are entering the cells
B)  Sodium ions are leaving the cell
C)  Potassium ions are entering the cell
D)  Potassium ions are leaving the cell
E)  Both sodium and potassium ions are leaving the cellF) D) and E)
G) A) and B)

Question 11

What type of neural circuit is best for producing a prolonged output?

Accepted Answer

A)  A converging circuit
B)  A diverging circuit
C)  A reverberating circuit
D)  A presynaptic pool
E)  An autonomic poolF) B) and C)
G) C) and D)

Question 12

Which glial cell is found wrapped around nerve fibers in the PNS?

Accepted Answer

A)  Oligodendrocytes
B)  Schwann cells
C)  Satellite cells
D)  Nodes of Ranvier
E)  Ependymal cellsF) D) and E)
G) A) and C)

Question 13

Which of the following are effectors?

Accepted Answer

A)  Receptors
B)  Stimuli
C)  Reflexes
D)  Glands
E)  Sense organsF) A) and B)
G) A) and E)

Question 14

Place the following events in synaptic transmission at a cholinergic synapse in order: A - A postsynaptic potential is produced; B - Voltage gated calcium channels open and calcium enters the cell; C - ACh is released and diffuses across the synaptic cleft; D - A nerve signal arrives at a synaptic knob; E - Ligand gated sodium channels open and sodium enters the cell.

Accepted Answer

A)  D, B, C, E, A
B)  D, B, E, A, C
C)  B, C, D, E, A
D)  B, D, C, A, EE) A) and B)
F) None of the above

Question 15

In a myelinated fiber,only the initial segment in the trigger zone has voltage-regulated channels.

Accepted Answer

A) True 
 B)False

Question 16

Neurons move material away from the soma by retrograde transport.

Accepted Answer

A) True 
 B)False

Question 17

In an action potential,which event directly follows repolarization?

Accepted Answer

A)  Threshold is reached
B)  Hyperpolarization of the membrane
C)  Depolarization of the membrane
D)  Hypopolarization of the membrane
E)  The resting membrane potential is reinstatedF) D) and E)
G) A) and B)

Question 18

Which body system(s) is(are) dedicated to maintaining stable internal conditions by detecting and responding to stimuli?

Accepted Answer

A)  Nervous and endocrine
B)  Nervous
C)  Endocrine
D)  Nervous, endocrine, and integumentaryE) A) and B)
F) A) and C)

Question 19

Oligodendrocytes serve the same purpose in the CNS that satellite cells do in the PNS.

Accepted Answer

A) True 
 B)False

Question 20

Where do most local potentials form in a neuron?

Accepted Answer

A)  The dendrites
B)  The somas
C)  The axon hillock
D)  The trigger zone
E)  The Schwann cellsF) B) and E)
G) C) and D)

Exam 12: Nervous Tissue

Which of the following are effectors?

Correct Answer
verified

In an action potential,which event directly follows repolarization?

Correct Answer
verified

An action potential never occurs in dendrites.

Correct Answer
verified

Correct Answer
verified

Which of these happens first in an cholinergic synaptic transmission?

Correct Answer
verified

Which glial cell is found wrapped around nerve fibers in the PNS?

Correct Answer
verified

Oligodendrocytes serve the same purpose in the CNS that satellite cells do in the PNS.

Correct Answer
verified

Which of these is an example of an EPSP in a typical neuron?

Correct Answer
verified

What type of neural circuit is best for producing a prolonged output?

Correct Answer
verified

What occurs during hyperpolarization of a neuron membrane?

Correct Answer
verified

Neurons move material away from the soma by retrograde transport.

Correct Answer
verified

A myelin sheath is composed primarily of __________.

Correct Answer
verified

What is another name for the autonomic nervous system?

Correct Answer
verified

In a myelinated fiber,only the initial segment in the trigger zone has voltage-regulated channels.

Correct Answer
verified

Where do most local potentials form in a neuron?

Correct Answer
verified

Where does saltatory conduction occur?

Correct Answer
verified

Some antidepressant drugs act by inhibiting monoamine oxidase (MAO) .What is the function of this enzyme?

Correct Answer
verified

Which body system(s) is(are) dedicated to maintaining stable internal conditions by detecting and responding to stimuli?

Correct Answer
verified

Which of the following will cause the plasma membrane to hyperpolarize when at its RMP?

Correct Answer
verified

During the absolute refractory period which of the following is true?

Correct Answer
verified

Exam 12: Nervous Tissue

Which of the following are effectors?

Correct AnswerverifiedShow Answer

In an action potential,which event directly follows repolarization?

Correct AnswerverifiedShow Answer

An action potential never occurs in dendrites.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of these happens first in an cholinergic synaptic transmission?

Correct AnswerverifiedShow Answer

Which glial cell is found wrapped around nerve fibers in the PNS?

Correct AnswerverifiedShow Answer

Oligodendrocytes serve the same purpose in the CNS that satellite cells do in the PNS.

Correct AnswerverifiedShow Answer

Which of these is an example of an EPSP in a typical neuron?

Correct AnswerverifiedShow Answer

What type of neural circuit is best for producing a prolonged output?

Correct AnswerverifiedShow Answer

What occurs during hyperpolarization of a neuron membrane?

Correct AnswerverifiedShow Answer

Neurons move material away from the soma by retrograde transport.

Correct AnswerverifiedShow Answer

A myelin sheath is composed primarily of __________.

Correct AnswerverifiedShow Answer

What is another name for the autonomic nervous system?

Correct AnswerverifiedShow Answer

In a myelinated fiber,only the initial segment in the trigger zone has voltage-regulated channels.

Correct AnswerverifiedShow Answer

Where do most local potentials form in a neuron?

Correct AnswerverifiedShow Answer

Where does saltatory conduction occur?

Correct AnswerverifiedShow Answer

Some antidepressant drugs act by inhibiting monoamine oxidase (MAO) .What is the function of this enzyme?

Correct AnswerverifiedShow Answer

Which body system(s) is(are) dedicated to maintaining stable internal conditions by detecting and responding to stimuli?

Correct AnswerverifiedShow Answer

Which of the following will cause the plasma membrane to hyperpolarize when at its RMP?

Correct AnswerverifiedShow Answer

During the absolute refractory period which of the following is true?

Correct AnswerverifiedShow Answer

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