Question 1

A change in resting membrane potential confined to a small area is called a/an ________ potential.

Accepted Answer

A)   local
B)   action
C)   summated
D)   after
E)   resting membraneF) None of the above
G) B) and E)

Question 2

When the voltage of a plasma membrane shifts from +35 mV towards 0 mV, the neuron is ________.

Accepted Answer

A)   depolarizing
B)   repolarizing
C)   hyperpolarizing
D)   reaching the threshold
E)   exiting the thresholdF) A) and E)
G) D) and E)

Question 3

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

Accepted Answer

A) True 
 B)False

Question 4

In hyperpolarization

Accepted Answer

A)   K+ tend to diffuse out of the cell.
B)   the plasma membrane's permeability to K+ decreases.
C)   the resting membrane potential moves closer to zero.
D)   Na+ enter the cell in large numbers.
E)   the resting membrane potential becomes more positive.F) B) and D)
G) C) and E)

Question 5

Inhibitory postsynaptic potentials (IPSPs)  are associated with which of the following?

Accepted Answer

A)   Depolarization of the plasma membrane
B)   Repolarization of the plasma membrane
C)   Hyperpolarization of the plasma membrane
D)   No change in the membrane potential
E)   No change of the thresholdF) B) and D)
G) A) and D)

Question 6

Identify the functions of the nervous system. (Check all that apply.)

Accepted Answer

A)   Controlling muscles and glands
B)   Controlling protein synthesis
C)   Integrating information
D)   Receiving sensory input
E)   Stimulating muscle growthF) B) and E)
G) None of the above

Question 7

An inhibitory local potential causes which of the following?

Accepted Answer

A)   Depolarization of the plasma membrane
B)   Hyperpolarization of the plasma membrane
C)   Repolarization of the plasma membrane
D)   Neutralization of the plasma membrane
E)   Drifting of the membrane potential towards the resting membrane potentialF) A) and E)
G) B) and D)

Question 8

Which of the following analogies best represents a parallel after-discharge circuit?

Accepted Answer

A)   An instructor instructs all students to solve the same problem.
B)   An instructor divides the class into four groups and assigns each group a different problem to solve.C) A) and B)
D) undefined

Question 9

Match the following concerning concentration differences across the plasma membrane.
-Higher concentration inside cell

Accepted Answer

A)  Concentration of K+
B)  Concentration of Na+ and Cl−
C)  Negatively charged proteins
D)  Sodium-potassium pump
E)  Plasma membrane is more permeable to this ion because of leak ion channelsF) B) and D)
G) None of the above

Question 10

The speed of an action potential depends on

Accepted Answer

A)   whether an axon is myelinated or not myelinated.
B)   thickness of the myelin sheath.
C)   the diameter of the axon.
D)   All of the choices are correct.E) A) and B)
F) A) and C)

Question 11

Each voltage-gated Na+ channel has two voltage sensitive gates: an activation gate and an inactivation gate. Which of the following would occur during depolarization?

Accepted Answer

A)   Activation gates are open; inactivation gates are closed.
B)   Activation gates are closed; inactivation gates are open.
C)   Both activation and inactivation gates are open.
D)   Both activation and inactivation gates are closed.
E)   None of the choices are correct.F) D) and E)
G) None of the above

Question 12

Theresa has been diagnosed with a disease that demyelinates the somatic motor neurons. This disease is destroying the ________ associated with neurons that control ________.

Accepted Answer

A)   Schwann cells; cardiac muscle
B)   Schwann cells; skeletal muscle
C)   oligodendrocytes; skeletal muscle
D)   oligodendrocytes; cardiac muscleE) B) and C)
F) B) and D)

Question 13

________ are collections of neuron cell bodies located outside of the central nervous system.

Accepted Answer

The answer of ________ are collections of neuron cell bodies...

Question 14

Which 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) A) and D)
G) B) and E)

Question 15

Which of the following statements regarding voltage-gated K+ channels is true?

Accepted Answer

A)   These channels have only one gate.
B)   These channels open more slowly than Na+ channels.
C)   Once open, these channels remain open until repolarization is complete.
D)   These channels are specific for K+.
E)   All of the choices are correct.F) B) and C)
G) D) and E)

Question 16

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 C)

Question 17

LouAnn is being treated for a neurological condition with a specific drug that target neurons deep within the brain. Which glial cell must be bypassed by this drug in order for it to be effective?

Accepted Answer

A)   Astrocyte
B)   Microglia
C)   Oligodendrocyte
D)   Ependymal cell
E)   MacrophageF) C) and D)
G) C) and E)

Question 18

Match the following concerning concentration differences across the plasma membrane.
-Large molecules trapped inside cell

Accepted Answer

A)  Concentration of K+
B)  Concentration of Na+ and Cl−
C)  Negatively charged proteins
D)  Sodium-potassium pump
E)  Plasma membrane is more permeable to this ion because of leak ion channelsF) D) and E)
G) B) and D)

Question 19

Axons

Accepted Answer

A)   contain the nucleus.
B)   are numerous extensions from each neuron.
C)   do not have a trigger zone.
D)   have a distal portion that branches to form the presynaptic terminals.
E)   do not have a resting membrane potential.F) All of the above
G) None of the above

Question 20

Identify the characteristics of action potentials. (Check all that apply.)

Accepted Answer

A)   Multiple stimuli can create larger action potentials, and fewer stimuli can create smaller action potentials.
B)   The strength of the stimulus determines the frequency of the action potentials.
C)   The strength of the stimulus determines the magnitude of the action potential.
D)   They are all-or-none
E)   They are propagated in a non-decremental fashion.F) B) and D)
G) B) and E)

Exam 11: Functional Organization of Nervous Tissue

Damage to a postsynaptic membrane would

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Which of the following analogies best represents a parallel after-discharge circuit?

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Each voltage-gated Na+ channel has two voltage sensitive gates: an activation gate and an inactivation gate. Which of the following would occur during depolarization?

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An inhibitory local potential causes which of the following?

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Which of the following statements regarding voltage-gated K+ channels is true?

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Identify the functions of the nervous system. (Check all that apply.)

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In hyperpolarization

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Inhibitory postsynaptic potentials (IPSPs) are associated with which of the following?

Correct AnswerverifiedShow Answer

LouAnn is being treated for a neurological condition with a specific drug that target neurons deep within the brain. Which glial cell must be bypassed by this drug in order for it to be effective?

Correct AnswerverifiedShow Answer

Theresa has been diagnosed with a disease that demyelinates the somatic motor neurons. This disease is destroying the ________ associated with neurons that control ________.

Correct AnswerverifiedShow Answer

Axons

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Match the following concerning concentration differences across the plasma membrane. -Large molecules trapped inside cell

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The speed of an action potential depends on

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

Correct AnswerverifiedShow Answer

Identify the characteristics of action potentials. (Check all that apply.)

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A change in resting membrane potential confined to a small area is called a/an ________ potential.

Correct AnswerverifiedShow Answer

________ are collections of neuron cell bodies located outside of the central nervous system.

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

Correct AnswerverifiedShow Answer

When the voltage of a plasma membrane shifts from +35 mV towards 0 mV, the neuron is ________.

Correct AnswerverifiedShow Answer

Match the following concerning concentration differences across the plasma membrane. -Higher concentration inside cell

Correct AnswerverifiedShow Answer

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Each voltage-gated Na⁺ channel has two voltage sensitive gates: an activation gate and an inactivation gate. Which of the following would occur during depolarization?

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Which of the following statements regarding voltage-gated K⁺ channels is true?

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Theresa has been diagnosed with a disease that demyelinates the somatic motor neurons. This disease is destroying the associated with neurons that control .

Correct Answer
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