Question 1

Mr. Miller has been hospitalized for the flu. The flu virus increases membrane permeability to potassium. You would expect his cells to

Accepted Answer

A)   depolarize.
B)   repolarize.
C)   isopolarize.
D)   hyperpolarize.
E)   hypopolarize.F) A) and E)
G) B) and D)

Question 2

Match the term with the correct definition.
-Action Potential

Accepted Answer

A)  a small change in the resting membrane potential confined to a small area
B)  a charge difference across the plasma membrane when the cell is in an unstimulated state
C)  a larger change in resting membrane potential that spreads over entire surface of a cell
D)  membrane becomes more positive when sodium ions diffuse into cell
E)  return to the resting membrane potentialF) A) and B)
G) D) and E)

Question 3

Gray matter on the surface of the brain is/are called

Accepted Answer

A)   the cortex.
B)   nuclei.
C)   ganglia.
D)   tracts.E) A) and B)
F) A) and C) A

Question 4

Arrange the events of synaptic transmission in correct sequence. (1)  sodium ions diffuse into the cell and cause a local potential
(2)  neurotransmitter binds with receptor on postsynaptic cell
(3)  neurotransmitter diffuses across the synaptic cleft
(4)  membrane permeability to sodium ions on postsynaptic cell increases
(5)  action potential causes release of neurotransmitter

Accepted Answer

A)   5, 2, 3, 4, 1
B)   5, 2, 3, 1, 4
C)   5, 3, 4, 1, 2
D)   5, 4, 3, 2, 1
E)   5, 3, 2, 4, 1F) C) and D)
G) A) and C)

Question 5

Identify structure "B" on the neuron.

Accepted Answer

A)   Schwann cell
B)   Node of Ranvier
C)   neuron cell body (soma) 
D)   dendrites
E)   axonF) D) and E)
G) A) and B)

Question 6

Depolarization of the nerve cell membrane occurs when there is a rapid influx (inflow)  of

Accepted Answer

A)   potassium ions.
B)   chloride ions.
C)   calcium ions.
D)   sodium ions.
E)   proteins.F) A) and B)
G) B) and C)

Question 7

Identify structure "C" on the neuron.

Accepted Answer

A)   Schwann cell
B)   Node of Ranvier
C)   neuron cell body (soma) 
D)   dendrites
E)   axonF) A) and B)
G) A) and C)

Question 8

Saltatory conduction of an action potential means that

Accepted Answer

A)   once one action potential is created, it moves down the axon.
B)   the whole axon depolarizes at the same time.
C)   one action potential stimulates the production of a new action potential at the adjacent site.
D)   an action potential is conducted from one node of Ranvier to the next node.E) None of the above
F) A) and B)

Question 9

A local potential

Accepted Answer

A)   does not occur until threshold.
B)   transmits information from one cell to another.
C)   might be a depolarization event but cannot be a hyperpolarization event.
D)   increases or decreases in direct proportion to the stimulus strength.
E)   does not alter resting membrane potential.F) A) and B)
G) A) and C)

Question 10

Viagra is used to treat erectile dysfunction by prolonging the effects of _____ on blood vessels.

Accepted Answer

A)   substance P
B)   dopamine
C)   GABA
D)   nitric oxide (NO) E) B) and C)
F) A) and C)

Question 11

The autonomic nervous system

Accepted Answer

A)   stimulates skeletal muscle contractions.
B)   has two sets of neurons in a series.
C)   is involved in problem solving.
D)   is under voluntary control.
E)   does not include the central nervous system.F) A) and D)
G) A) and E) B

Question 12

A decrease in the number of voltage-gated Ca2+ ion channels in the presynaptic terminal would

Accepted Answer

A)   enhance transmission across the synapse.
B)   reduce or inhibit transmission across the synapse.
C)   have no effect on transmission across the synapse.
D)   alter receptors on the postsynaptic membrane.
E)   increase exocytosis.F) A) and B)
G) None of the above

Question 13

If five action potentials arrive at the same synapse in very close succession, which of the following would occur?

Accepted Answer

A)   The direction of the action potential is reversed.
B)   Temporal summation occurs.
C)   Spatial summation occurs.
D)   Hyperpolarization occurs.
E)   Depolarization always occurs.F) A) and E)
G) A) and C)

Question 14

Continuous conduction of an action potential means that

Accepted Answer

A)   once one action potential is created, it moves down the axon.
B)   the whole axon depolarizes at the same time.
C)   one action potential stimulates the production of a new action potential at the adjacent site.
D)   an action potential is conducted from one node of Ranvier to the next node.E) A) and B)
F) A) and D)

Question 15

Which of the following events is NOT a characteristic of an action potential?

Accepted Answer

A)   The plasma membrane becomes highly permeable to sodium ions and depolarization results.
B)   As sodium ions enter, the inside of the plasma membrane becomes more negative.
C)   At the peak of depolarization, sodium channels begin to close and potassium channels open.
D)   In repolarization, potassium ions flow out of the cell.
E)   Action potentials occur according to the all-or-none principle.F) B) and C)
G) A) and E)

Question 16

Action potentials are conducted more rapidly when transmission is

Accepted Answer

A)   from node to node on a myelinated axon.
B)   on a small diameter axon.
C)   on an unmyelinated axon.
D)   from internode to internode.
E)   from internode to node on a myelinated axon.F) None of the above
G) A) and B) A

Question 17

Match the neuroglial cell with its function.
-oligodendrocyte

Accepted Answer

A)  influence function of blood-brain barrier
B)  macrophages in CNS
C)  produce cerebrospinal fluid
D)  form myelin sheath around axons in CNS
E)  form myelin sheath around part of the axon in the PNSF) A) and E)
G) All of the above

Question 18

Suppose both excitatory and inhibitory neurons synapse with a single postsynaptic neuron. What determines if an action potential is initiated in the postsynaptic neuron?

Accepted Answer

A)   the kind of neuron involved
B)   the size of the neuron involved
C)   whether the neuron is myelinated or non-myelinated
D)   the number of EPSPs in relation to the number of IPSPs
E)   This situation is not possible in humans.F) C) and D)
G) None of the above

Question 19

Action potentials at a chemical synapse

Accepted Answer

A)   travel from presynaptic terminal to postsynaptic membrane.
B)   travel from postsynaptic membrane to presynaptic terminal.
C)   travel back and forth from presynaptic terminal to postsynaptic membrane.
D)   travel from presynaptic terminal to presynaptic membrane.
E)   stop at the presynaptic terminal and are regenerated on the postsynaptic membrane.F) C) and E)
G) B) and D)

Question 20

Damage to a postsynaptic membrane would

Accepted Answer

A)   increase neurotransmitter release.
B)   decrease the release of neurotransmitter.
C)   increase neurotransmitter production.
D)   interfere with the ability to respond to neurotransmitter.
E)   destroy vesicles containing neurotransmitter.F) A) and B)
G) B) and E)

Exam 11: Functional Organization of Nervous Tissue

Mr. Miller has been hospitalized for the flu. The flu virus increases membrane permeability to potassium. You would expect his cells to

Correct Answer
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Match the term with the correct definition. -Action Potential

Correct Answer
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Gray matter on the surface of the brain is/are called

Correct Answer
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A

Correct Answer
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Identify structure "B" on the neuron.

Correct Answer
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Depolarization of the nerve cell membrane occurs when there is a rapid influx (inflow) of

Correct Answer
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Identify structure "C" on the neuron.

Correct Answer
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Saltatory conduction of an action potential means that

Correct Answer
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A local potential

Correct Answer
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Viagra is used to treat erectile dysfunction by prolonging the effects of _____ on blood vessels.

Correct Answer
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The autonomic nervous system

Correct Answer
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B

A decrease in the number of voltage-gated Ca²⁺ ion channels in the presynaptic terminal would

Correct Answer
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If five action potentials arrive at the same synapse in very close succession, which of the following would occur?

Correct Answer
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Continuous conduction of an action potential means that

Correct Answer
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Which of the following events is NOT a characteristic of an action potential?

Correct Answer
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Action potentials are conducted more rapidly when transmission is

Correct Answer
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A

Match the neuroglial cell with its function. -oligodendrocyte

Correct Answer
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Suppose both excitatory and inhibitory neurons synapse with a single postsynaptic neuron. What determines if an action potential is initiated in the postsynaptic neuron?

Correct Answer
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Action potentials at a chemical synapse

Correct Answer
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Damage to a postsynaptic membrane would

Correct Answer
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Exam 11: Functional Organization of Nervous Tissue

Mr. Miller has been hospitalized for the flu. The flu virus increases membrane permeability to potassium. You would expect his cells to

Correct AnswerverifiedShow Answer

Match the term with the correct definition. -Action Potential

Correct AnswerverifiedShow Answer

Gray matter on the surface of the brain is/are called

Correct AnswerverifiedA

Correct AnswerverifiedShow Answer

Identify structure "B" on the neuron.

Correct AnswerverifiedShow Answer

Depolarization of the nerve cell membrane occurs when there is a rapid influx (inflow) of

Correct AnswerverifiedShow Answer

Identify structure "C" on the neuron.

Correct AnswerverifiedShow Answer

Saltatory conduction of an action potential means that

Correct AnswerverifiedShow Answer

A local potential

Correct AnswerverifiedShow Answer

Viagra is used to treat erectile dysfunction by prolonging the effects of _____ on blood vessels.

Correct AnswerverifiedShow Answer

The autonomic nervous system

Correct AnswerverifiedB

A decrease in the number of voltage-gated Ca2+ ion channels in the presynaptic terminal would

Correct AnswerverifiedShow Answer

If five action potentials arrive at the same synapse in very close succession, which of the following would occur?

Correct AnswerverifiedShow Answer

Continuous conduction of an action potential means that

Correct AnswerverifiedShow Answer

Which of the following events is NOT a characteristic of an action potential?

Correct AnswerverifiedShow Answer

Action potentials are conducted more rapidly when transmission is

Correct AnswerverifiedA

Match the neuroglial cell with its function. -oligodendrocyte

Correct AnswerverifiedShow Answer

Suppose both excitatory and inhibitory neurons synapse with a single postsynaptic neuron. What determines if an action potential is initiated in the postsynaptic neuron?

Correct AnswerverifiedShow Answer

Action potentials at a chemical synapse

Correct AnswerverifiedShow Answer

Damage to a postsynaptic membrane would

Correct AnswerverifiedShow Answer

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A

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B

A decrease in the number of voltage-gated Ca²⁺ ion channels in the presynaptic terminal would

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A

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