Question 1

If all of a neuron's dendrites or axons were contained within the spinal cord,it would be considered a(n) ____ neuron.​

Accepted Answer

A)  efferent
B)  ​afferent
C)  ​intrinsic
D)  PurkinjeE) A) and B)
F) A) and C)

Question 2

The two basic kinds of cells in the nervous system are _____.​

Accepted Answer

A)  neurons and glia
B)  ​dendrites and axons
C)  ​ribosomes and lysosomes
D)  neurons and axonsE) B) and C)
F) A) and D)

Question 3

Why do neurons rely so heavily on glucose as their source of nutrition?​

Accepted Answer

A)  Neurons lack the enzymes necessary to metabolize other fuels.
B)  ​Glucose is the only fuel that can be used even in the absence of vitamins.
C)  ​Glucose is not used extensively by other parts of the body.
D)  Other fuels do not readily cross the blood-brain barrier.E) A) and C)
F) All of the above

Question 4

Which action 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 D)
F) None of the above

Question 5

Korsakoff's syndrome ____.​

Accepted Answer

A)  is marked by severe memory impairments
B)  ​results from too much thiamine
C)  ​results from lack of oxygen to the brain
D)  is due to a breakdown of the blood-brain barrierE) A) and C)
F) A) and B)

Question 6

Dendrites contain the nuclei,ribosomes,mitochondria,and other structures found in most cells.

Accepted Answer

A) True 
 B)False

Question 7

In the normal course of an action potential,____.​

Accepted Answer

A)  sodium channel remain open for long periods of time
B)  ​the concentration of sodium equalizes across the membrane
C)  ​sodium remains much more concentrated outside than inside the neuron
D)  subthreshold stimulation intensifies the action potentialE) B) and D)
F) C) and D)

Question 8

What term describes the difference in voltage that typically exists between the inside and the outside of a neuron?​

Accepted Answer

A)  concentration gradient
B)  ​generator potential
C)  ​resting potential
D)  shock gradientE) A) and B)
F) B) and C)

Question 9

What type of neuron in the pons receives information only from other cells in the pons and sends information only to other cells in the pons?​

Accepted Answer

A)  afferent
B)  ​efferent
C)  ​intrinsic
D)  inter-synapticE) B) and C)
F) None of the above

Question 10

As a general rule,axons convey information ____.​

Accepted Answer

A)  toward dendrites of their own cell
B)  ​toward their own cell body
C)  ​away from their own cell body
D)  to surrounding gliaE) All of the above
F) C) and D)

Question 11

What causes potassium ions to leave the axon just after the peak of the action potential?​

Accepted Answer

A)  a continuing concentration gradient and the opening of the potassium gates
B)  ​an increase in the concentration gradient across the membrane
C)  ​an increased tendency of the sodium-potassium pump to push potassium out
D)  binding of potassium ions to proteins that leave at this timeE) A) and D)
F) A) and C)

Question 12

An axon has many branches,each of which swells at its tip.These are known as ____.​

Accepted Answer

A)  presynaptic terminals
B)  ​efferent axons
C)  ​afferent axons
D)  intrinsic neuronsE) None of the above
F) All of the above

Question 13

Which action will produce a hyperpolarization of a neuron?​

Accepted Answer

A)  applying a negative charge inside the neuron with a microelectrode
B)  ​applying a positive charge inside the neuron with a microelectrode
C)  ​increasing the membrane's permeability to sodium
D)  decreasing the membrane's permeability to potassiumE) None of the above
F) C) and D)

Question 14

____ in the brain and spinal cord and ____ in the periphery are specialized types of glia that build the myelin sheaths that surround neurons.​

Accepted Answer

A)  Oligodendrocytes; Schwann cells
B)  ​Schwann cells; oligodendrocytes
C)  ​Microglia; oligodendrocytes
D)  Radial glia; Schwann cellsE) A) and B)
F) A) and C)

Question 15

​The difference in voltage in a resting neuron is called the resting potential.

Accepted Answer

A) True 
 B)False

Question 16

Water,oxygen,and ____ most freely flow across a cell membrane.​

Accepted Answer

A)  calcium
B)  ​positively charged ions
C)  ​magnesium
D)  carbon dioxideE) None of the above
F) All of the above

Question 17

When a neuron's membrane is at rest,the concentration gradient tends to move sodium ____ the cell and the electrical gradient tends to move it ____ the cell.​

Accepted Answer

A)  into; into
B)  ​into; out of
C)  ​out of; into
D)  out of; out ofE) None of the above
F) A) and B)

Question 18

When the neuron is at rest,what is primarily responsible for moving potassium ions OUT of the cell?​

Accepted Answer

A)  a concentration gradient
B)  ​an electrical gradient
C)  ​both a concentration gradient and an electrical gradient
D)  the sodium-potassium pumpE) A) and B)
F) All of the above

Question 19

What leads to Korsakoff's syndrome?​

Accepted Answer

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

Question 20

What type of glial cells myelinate axons in the brain and spinal cord?​

Accepted Answer

A)  oligodendrocytes
B)  ​Schwann cells
C)  ​radial glia
D)  astrocytesE) B) and D)
F) All of the above

Exam 1: Nerve Cells and Nerve Impulses

Why do neurons rely so heavily on glucose as their source of nutrition?​

Correct AnswerverifiedShow Answer

Water,oxygen,and ____ most freely flow across a cell membrane.​

Correct AnswerverifiedShow Answer

An axon has many branches,each of which swells at its tip.These are known as ____.​

Correct AnswerverifiedShow Answer

____ in the brain and spinal cord and ____ in the periphery are specialized types of glia that build the myelin sheaths that surround neurons.​

Correct AnswerverifiedShow Answer

What causes potassium ions to leave the axon just after the peak of the action potential?​

Correct AnswerverifiedShow Answer

When the neuron is at rest,what is primarily responsible for moving potassium ions OUT of the cell?​

Correct AnswerverifiedShow Answer

What term describes the difference in voltage that typically exists between the inside and the outside of a neuron?​

Correct AnswerverifiedShow Answer

The two basic kinds of cells in the nervous system are _____.​

Correct AnswerverifiedShow Answer

​The difference in voltage in a resting neuron is called the resting potential.

Correct AnswerverifiedShow Answer

As a general rule,axons convey information ____.​

Correct AnswerverifiedShow Answer

Dendrites contain the nuclei,ribosomes,mitochondria,and other structures found in most cells.

Correct AnswerverifiedShow Answer

What type of glial cells myelinate axons in the brain and spinal cord?​

Correct AnswerverifiedShow Answer

If all of a neuron's dendrites or axons were contained within the spinal cord,it would be considered a(n) ____ neuron.​

Correct AnswerverifiedShow Answer

Korsakoff's syndrome ____.​

Correct AnswerverifiedShow Answer

What type of neuron in the pons receives information only from other cells in the pons and sends information only to other cells in the pons?​

Correct AnswerverifiedShow Answer

When a neuron's membrane is at rest,the concentration gradient tends to move sodium ____ the cell and the electrical gradient tends to move it ____ the cell.​

Correct AnswerverifiedShow Answer

Which action will produce a hyperpolarization of a neuron?​

Correct AnswerverifiedShow Answer

Which action would depolarize a neuron?​

Correct AnswerverifiedShow Answer

In the normal course of an action potential,____.​

Correct AnswerverifiedShow Answer

What leads to Korsakoff's syndrome?​

Correct AnswerverifiedShow Answer

Why do neurons rely so heavily on glucose as their source of nutrition?

Correct Answer
verified

Water,oxygen,and ____ most freely flow across a cell membrane.

Correct Answer
verified

An axon has many branches,each of which swells at its tip.These are known as ____.

Correct Answer
verified

in the brain and spinal cord and in the periphery are specialized types of glia that build the myelin sheaths that surround neurons.

Correct Answer
verified

What causes potassium ions to leave the axon just after the peak of the action potential?

Correct Answer
verified

When the neuron is at rest,what is primarily responsible for moving potassium ions OUT of the cell?

Correct Answer
verified

What term describes the difference in voltage that typically exists between the inside and the outside of a neuron?

Correct Answer
verified

The two basic kinds of cells in the nervous system are _____.

Correct Answer
verified

The difference in voltage in a resting neuron is called the resting potential.

Correct Answer
verified

As a general rule,axons convey information ____.

Correct Answer
verified

Correct Answer
verified

What type of glial cells myelinate axons in the brain and spinal cord?

Correct Answer
verified

If all of a neuron's dendrites or axons were contained within the spinal cord,it would be considered a(n) ____ neuron.

Correct Answer
verified

Korsakoff's syndrome ____.

Correct Answer
verified

What type of neuron in the pons receives information only from other cells in the pons and sends information only to other cells in the pons?

Correct Answer
verified

When a neuron's membrane is at rest,the concentration gradient tends to move sodium the cell and the electrical gradient tends to move it the cell.

Correct Answer
verified

Which action will produce a hyperpolarization of a neuron?

Correct Answer
verified

Which action would depolarize a neuron?

Correct Answer
verified

In the normal course of an action potential,____.

Correct Answer
verified

What leads to Korsakoff's syndrome?

Correct Answer
verified