Question 1

Glial cells serve many functions.

Accepted Answer

A) True 
 B)False

Question 2

Concentration gradients lead to what kind of movements?

Accepted Answer

A)   the general movement of ions into the neuron
B)   the general movement of ions out of the neuron
C)   the movement of ions to areas of their highest concentrations
D)   the movement of ions to areas of their lowest concentrationsE) C) and D)
F) A) and B) D

Question 3

The selectivity of a neuron membrane is analogous to:

Accepted Answer

A)   the blood-brain barrier.
B)   the action potential.
C)   the resting potential.
D)   myelin.E) A) and B)
F) B) and D)

Question 4

Neurons are distinguished from other cells by their shape.

Accepted Answer

A) True 
 B)False

Question 5

What is the result if a stimulus shifts the potential inside a neuron from the resting potential to a more negative potential?

Accepted Answer

A)   Hyperpolarization
B)   Depolarization
C)   an action potential
D)   a thresholdE) B) and C)
F) A) and B)

Question 6

Which of the following is NOT a characteristic of a dendrite?

Accepted Answer

A)   It tapers as it gets further from the cell body.
B)   It is in contact with the dendrites of other neurons.
C)   Its surface may be lined with synaptic receptors.
D)   It receives information from other neurons or the environment.E) All of the above
F) A) and D)

Question 7

A local neuron:

Accepted Answer

A)   has an axon approximately a meter long.
B)   conveys information to other neurons across great distances.
C)   is a small neuron with no axon or a very short one.
D)   has an axon with many branches far from the cell body.E) C) and D)
F) None of the above

Question 8

Which type of glia builds myelin sheaths around axons in the periphery of the body?

Accepted Answer

A)   astrocytes
B)   Schwann cells
C)   oligodendrocytes
D)   radial gliaE) B) and C)
F) A) and C)

Question 9

When stating that the neuron's membrane is polarized, you are referring to a difference in electrical potential between:

Accepted Answer

A)   the axons and the dendrites.
B)   the axon hillock and the cell body.
C)   sodium ions and potassium ions.
D)   the inside and the outside of the membrane.E) B) and D)
F) B) and C) D

Question 10

The main feature that distinguishes a neuron from other animal cells is that a neuron has:

Accepted Answer

A)   a larger nucleus.
B)   a distinctive shape.
C)   the ability to metabolize a variety of fuels.
D)   a high internal concentration of sodium ions.E) C) and D)
F) B) and D) B

Question 11

What leads to Korsakoff's syndrome?

Accepted Answer

A)   thiamine deficiency resulting from alcoholism
B)   glucose deficiency resulting from alcoholism
C)   viruses that manage to cross the blood-brain barrier
D)   glial cells that over-reproduce and increase pressure in the brainE) C) and D)
F) A) and B)

Question 12

Which of the following is NOT a characteristic of an axon?

Accepted Answer

A)   It can be up to a meter long.
B)   It has a constant diameter.
C)   It carries information toward the cell body.
D)   It may be covered with a myelin sheath.E) A) and D)
F) None of the above

Question 13

The all-or-none law applies to:

Accepted Answer

A)   cell bodies of neurons.
B)   dendrites.
C)   axons.
D)   all parts of a neuron.E) None of the above
F) B) and D)

Question 14

Nodes of Ranvier are:

Accepted Answer

A)   gaps in the myelin of axons.
B)   the same as the myelin sheath.
C)   the spiny outgrowths on dendrites.
D)   responsible for cell metabolism.E) B) and C)
F) A) and C)

Question 15

Glial cells whose function most closely resembles that of the immune system are called:

Accepted Answer

A)   oligodendrocytes.
B)   Schwann cells.
C)   microglia.
D)   radial glia.E) None of the above
F) All of the above

Question 16

Small, charged molecules can cross the cell membrane through:

Accepted Answer

A)   diffusion.
B)   ribosomes.
C)   mitochondria.
D)   protein channels.E) All of the above
F) A) and B)

Question 17

What is the point from which an axon releases chemicals into the synapse?

Accepted Answer

A)   the myelin sheath
B)   the presynaptic terminal
C)   a dendritic spine
D)   the endoplasmic reticulumE) None of the above
F) A) and D)

Question 18

The major disadvantage of a blood-brain barrier is that:

Accepted Answer

A)   many chemicals can easily diffuse into the brain.
B)   it requires so much glucose to maintain it.
C)   certain required chemicals must be actively transported.
D)   viruses can't escape.E) A) and B)
F) A) and C)

Question 19

Briefly describe the refractory period of a neuron.

Accepted Answer

The refractory period of a neuron refers...

Question 20

Which of the following actions would depolarize a neuron?

Accepted Answer

A)   decreasing membrane permeability to calcium
B)   increasing membrane permeability to potassium
C)   decreasing membrane permeability to sodium
D)   increasing membrane permeability to sodiumE) A) and B)
F) None of the above

Exam 2: Nerve Cells and Nerve Impulses

Glial cells serve many functions.

Correct AnswerverifiedShow Answer

Concentration gradients lead to what kind of movements?

Correct AnswerverifiedD

The selectivity of a neuron membrane is analogous to:

Correct AnswerverifiedShow Answer

Neurons are distinguished from other cells by their shape.

Correct AnswerverifiedShow Answer

What is the result if a stimulus shifts the potential inside a neuron from the resting potential to a more negative potential?

Correct AnswerverifiedShow Answer

Which of the following is NOT a characteristic of a dendrite?

Correct AnswerverifiedShow Answer

A local neuron:

Correct AnswerverifiedShow Answer

Which type of glia builds myelin sheaths around axons in the periphery of the body?

Correct AnswerverifiedShow Answer

When stating that the neuron's membrane is polarized, you are referring to a difference in electrical potential between:

Correct AnswerverifiedD

The main feature that distinguishes a neuron from other animal cells is that a neuron has:

Correct AnswerverifiedB

What leads to Korsakoff's syndrome?

Correct AnswerverifiedShow Answer

Which of the following is NOT a characteristic of an axon?

Correct AnswerverifiedShow Answer

The all-or-none law applies to:

Correct AnswerverifiedShow Answer

Nodes of Ranvier are:

Correct AnswerverifiedShow Answer

Glial cells whose function most closely resembles that of the immune system are called:

Correct AnswerverifiedShow Answer

Small, charged molecules can cross the cell membrane through:

Correct AnswerverifiedShow Answer

What is the point from which an axon releases chemicals into the synapse?

Correct AnswerverifiedShow Answer

The major disadvantage of a blood-brain barrier is that:

Correct AnswerverifiedShow Answer

Briefly describe the refractory period of a neuron.

Correct AnswerAnswered by ExamLex AIThe refractory period of a neuron refers...View AnswerShow Answer

Which of the following actions would depolarize a neuron?

Correct AnswerverifiedShow Answer

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D

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D

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B

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Answered by ExamLex AI
The refractory period of a neuron refers...
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