Question 1

Damage to ependymal cells would most likely affect the

Accepted Answer

A)   formation of myelin sheaths.
B)   formation of cerebrospinal fluid.
C)   formation of ganglia.
D)   repair of axons.
E)   transport of neurotransmitters within axons.F) A) and B)
G) C) and E)

Question 2

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

Accepted Answer

A)   a myelinated fiber of 10-µm diameter
B)   a nonmyelinated fiber of 20-µm diameter
C)   a myelinated fiber of 1-µm diameter
D)   a nonmyelinated fiber of 10-µm diameter
E)   It would be the same in all because of the all-or-none principle.F) A) and B)
G) B) and D)

Question 3

Adrenergic synapses release the neurotransmitter

Accepted Answer

A)   acetylcholine.
B)   norepinephrine.
C)   dopamine.
D)   serotonin.
E)   GABA.F) A) and D)
G) None of the above

Question 4

________ carry motor information to peripheral effectors.

Accepted Answer

A)   Unipolar neurons
B)   Efferent neurons
C)   Multipolar neurons
D)   Afferent neurons
E)   InterneuronsF) A) and E)
G) B) and E)

Question 5

Figure 12-2 The Nerve Action Potential
 
Use Figure 12-2 to answer the following questions:
-Which area of the graph shows when potassium channels open?

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) C) and D)
F) None of the above

Question 6

The axon is connected to the soma at the

Accepted Answer

A)   telodendria.
B)   synaptic terminal.
C)   collaterals.
D)   axon hillock.
E)   synapse.F) C) and D)
G) A) and D)

Question 7

Figure 12-1 The Neuron
 
Use Figure 12-1 to answer the following questions:
-Which part(s)  of the neuron can propagate an action potential?

Accepted Answer

A)   1
B)   1 and 2
C)   2 and 3
D)   3E) B) and D)
F) B) and C)

Question 8

Which of the following can cause demyelination?

Accepted Answer

A)   arsenic poisoning
B)   diphtheria
C)   multiple sclerosis
D)   mercury exposure
E)   Demyelination can be caused by arsenic, diphtheria, multiple sclerosis and mercury.F) A) and C)
G) A) and E)

Question 9

Which neurotransmitter has widespread effects on a person's attention and emotional state?

Accepted Answer

A)   dopamine
B)   norepinephrine
C)   serotonin
D)   GABA
E)   endorphinsF) B) and C)
G) B) and D)

Question 10

Opening of sodium channels in the axon membrane causes

Accepted Answer

A)   depolarization.
B)   repolarization.
C)   hyperpolarization.
D)   increased negative charge inside the membrane.
E)   inhibition.F) C) and D)
G) A) and B)

Question 11

Most neurons lack ________ and so are permanently blocked from undergoing cell division.

Accepted Answer

A)   ribosomes
B)   endoplasmic reticula
C)   a nucleus
D)   centrioles
E)   cytoplasmF) B) and C)
G) C) and D)

Question 12

When potassium channels open and the ions diffuse through the membrane,

Accepted Answer

A)   the inside of the membrane will become more positive.
B)   the inside of the membrane will become more negative.
C)   there will be almost no effect on transmembrane potential.
D)   the membrane will become depolarized.
E)   the membrane will depolarize to threshold.F) B) and E)
G) None of the above

Question 13

________ nerves are nerves that connect to the spinal cord.

Accepted Answer

A)   Spinal
B)   Cranial
C)   Afferent
D)   Multipolar
E)   AutonomicF) A) and B)
G) C) and D)

Question 14

Which of the following activities or sensations is/are not monitored by interoceptors?

Accepted Answer

A)   sight
B)   pain
C)   activities of the digestive system
D)   cardiovascular activities
E)   urinary activitiesF) None of the above
G) B) and E)

Question 15

The neuroglial cells that participate in maintaining the blood-brain barrier are the

Accepted Answer

A)   astrocytes.
B)   ependymal cells.
C)   microglia.
D)   oligodendrocytes.
E)   Schwann cells.F) D) and E)
G) B) and D)

Question 16

Figure 12-2 The Nerve Action Potential
 
Use Figure 12-2 to answer the following questions:
-Which area of the graph shows when voltage-gated sodium channels are open?

Accepted Answer

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

Question 17

Below are the events that occur during continuous propagation of action potential. Select the correct order in which the events occur.
1)  Adjacent membrane segment depolarizes.
2)  Local current spreads to adjacent voltage gated channel.
3)  Threshold is met.
4)  Local current develops due to sodium moving in the cytosol.

Accepted Answer

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

Question 18

The molecule responsible for making cyclic AMP is called

Accepted Answer

A)   adenylate cyclase.
B)   adenosine.
C)   anandamide.
D)   adenosine synthase.
E)   G-protein.F) None of the above
G) D) and E)

Question 19

________ channels open or close in response to physical distortion of the membrane surface.

Accepted Answer

A)   Voltage-gated
B)   Chemically gated
C)   Active
D)   Mechanically gated
E)   LeakF) B) and D)
G) D) and E)

Question 20

How would a chemical that prevents the opening of voltage-regulated Na+ channels affect the function ofa neuron?

Accepted Answer

A)   The neuron will only be able to hyperpolarize.
B)   The neuron will depolarize more rapidly.
C)   Action potentials will lack a repolarization phase.
D)   The neuron will automatically and repeatedly produce graded potentials.
E)   The neuron will only be capable of producing graded potentials.F) All of the above
G) C) and D)

Exam 12: Nervous Tissue

Figure 12-1 The Neuron Use Figure 12-1 to answer the following questions: -Which part(s) of the neuron can propagate an action potential?

Correct Answer
verified

Adrenergic synapses release the neurotransmitter

Correct Answer
verified

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

Correct Answer
verified

Most neurons lack ________ and so are permanently blocked from undergoing cell division.

Correct Answer
verified

How would a chemical that prevents the opening of voltage-regulated Na+ channels affect the function ofa neuron?

Correct Answer
verified

Figure 12-2 The Nerve Action Potential Use Figure 12-2 to answer the following questions: -Which area of the graph shows when potassium channels open?

Correct Answer
verified

Which of the following activities or sensations is/are not monitored by interoceptors?

Correct Answer
verified

Which neurotransmitter has widespread effects on a person's attention and emotional state?

Correct Answer
verified

________ nerves are nerves that connect to the spinal cord.

Correct Answer
verified

Which of the following can cause demyelination?

Correct Answer
verified

________ carry motor information to peripheral effectors.

Correct Answer
verified

The molecule responsible for making cyclic AMP is called

Correct Answer
verified

Opening of sodium channels in the axon membrane causes

Correct Answer
verified

Damage to ependymal cells would most likely affect the

Correct Answer
verified

The neuroglial cells that participate in maintaining the blood-brain barrier are the

Correct Answer
verified

When potassium channels open and the ions diffuse through the membrane,

Correct Answer
verified

Correct Answer
verified

________ channels open or close in response to physical distortion of the membrane surface.

Correct Answer
verified

The axon is connected to the soma at the

Correct Answer
verified

Figure 12-2 The Nerve Action Potential Use Figure 12-2 to answer the following questions: -Which area of the graph shows when voltage-gated sodium channels are open?

Correct Answer
verified

Exam 12: Nervous Tissue

Figure 12-1 The Neuron Use Figure 12-1 to answer the following questions: -Which part(s) of the neuron can propagate an action potential?

Correct AnswerverifiedShow Answer

Adrenergic synapses release the neurotransmitter

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Most neurons lack ________ and so are permanently blocked from undergoing cell division.

Correct AnswerverifiedShow Answer

How would a chemical that prevents the opening of voltage-regulated Na+ channels affect the function ofa neuron?

Correct AnswerverifiedShow Answer

Figure 12-2 The Nerve Action Potential Use Figure 12-2 to answer the following questions: -Which area of the graph shows when potassium channels open?

Correct AnswerverifiedShow Answer

Which of the following activities or sensations is/are not monitored by interoceptors?

Correct AnswerverifiedShow Answer

Which neurotransmitter has widespread effects on a person's attention and emotional state?

Correct AnswerverifiedShow Answer

________ nerves are nerves that connect to the spinal cord.

Correct AnswerverifiedShow Answer

Which of the following can cause demyelination?

Correct AnswerverifiedShow Answer

________ carry motor information to peripheral effectors.

Correct AnswerverifiedShow Answer

The molecule responsible for making cyclic AMP is called

Correct AnswerverifiedShow Answer

Opening of sodium channels in the axon membrane causes

Correct AnswerverifiedShow Answer

Damage to ependymal cells would most likely affect the

Correct AnswerverifiedShow Answer

The neuroglial cells that participate in maintaining the blood-brain barrier are the

Correct AnswerverifiedShow Answer

When potassium channels open and the ions diffuse through the membrane,

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

________ channels open or close in response to physical distortion of the membrane surface.

Correct AnswerverifiedShow Answer

The axon is connected to the soma at the

Correct AnswerverifiedShow Answer

Figure 12-2 The Nerve Action Potential Use Figure 12-2 to answer the following questions: -Which area of the graph shows when voltage-gated sodium channels are open?

Correct AnswerverifiedShow Answer

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