Question 1

The basic functional unit of the nervous system is the ________.

Accepted Answer

The answer of The basic functional unit of the nervous...

Question 2

Figure 12-1 The Neuron
Use Figure 12-1 to answer the following questions:
-Which type of membrane channels are found at label "3"?

Accepted Answer

A)  voltage-gated Na⁺ channels
B)  voltage-gated K⁺ channels
C)  chemically-gated Na⁺ and K⁺ channels
D)  voltage-gated Ca²⁺ channels
E)  both voltage-gated Na⁺ channels and voltage-gated K⁺ channelsF) B) and E)
G) C) and D)

Question 3

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

Accepted Answer

A)  sight
B)  taste
C)  activities of the digestive system
D)  cardiovascular activities
E)  urinary activitiesF) A) and E)
G) All of the above

Question 4

________ line the brain ventricles and spinal canal.

Accepted Answer

A)  Astrocytes
B)  Satellite cells
C)  Oligodendrocytes
D)  Microglia
E)  Ependymal cellsF) None of the above
G) All of the above

Question 5

What triggers the release of acetylcholine from a synaptic terminal?

Accepted Answer

A)  release of calcium ions from the synaptic vesicles
B)  graded potentials in the synaptic terminal
C)  synaptic vesicles fuse to dendrites
D)  diffusion of sodium ions out of the synaptic terminal
E)  diffusion of calcium ions into the synaptic terminalF) B) and C)
G) A) and D)

Question 6

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

Accepted Answer

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

Question 7

________ neurons are small and have no anatomical features that distinguish dendrites from axons.

Accepted Answer

A)  Multipolar
B)  Anaxonic
C)  Unipolar
D)  Bipolar
E)  SensoryF) A) and C)
G) A) and E)

Question 8

________ carry motor information to peripheral effectors.(Note: Be sure to capitalize the first letter of your answer).

Accepted Answer

The answer of ________ carry motor information to peripheral effectors.(Note:...

Question 9

A shift of the resting transmembrane potential toward 0 mV is called ________.

Accepted Answer

The answer of A shift of the resting transmembrane potential...

Question 10

The sodium-potassium ion exchange pump

Accepted Answer

A)  must reestablish ion concentrations after each action potential.
B)  transports sodium ions into the cell during depolarization.
C)  transports potassium ions out of the cell during repolarization.
D)  moves sodium and potassium opposite to the direction of their electrochemical gradients.
E)  depends on a hydrogen gradient for energy.F) A) and D)
G) B) and E)

Question 11

If the axon terminal of a motor neuron suddenly became permeable to calcium ion,

Accepted Answer

A)  the neuron will fire an action potential.
B)  the motor end plate will be depolarized.
C)  the motor end plate will be hyperpolarized.
D)  neurotransmitter release will be blocked.
E)  the neuron will become unable to stimulate the muscle cell.F) All of the above
G) B) and D)

Question 12

A movement of charges in response to a potential difference is called a ________.

Accepted Answer

The answer of A movement of charges in response to...

Question 13

If the sodium-potassium pumps in the plasma membrane fail to function,all of the following occur,except

Accepted Answer

A)  the intracellular concentration of potassium ions will increase.
B)  the neuron will slowly depolarize.
C)  the membrane will slowly lose its capacity to generate action potentials.
D)  the inside of the membrane will have a resting potential that is more positive than normal.
E)  the intracellular concentration of sodium ions will increase.F) B) and C)
G) C) and E)

Question 14

________ 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) None of the above
G) B) and D)

Question 15

The cytoplasm that surrounds the nucleus of a neuron is called the

Accepted Answer

A)  protoplasm.
B)  nucleoplasm.
C)  sarcoplasm.
D)  neuroplasm.
E)  perikaryon.F) B) and D)
G) A) and E)

Question 16

Figure 12-2 The Nerve Action Potential
Use Figure 12-2 to answer the following questions:
-Which point of the graph shows when potassium ion outflow exceeds sodium ion inflow?

Accepted Answer

A)  1
B)  2
C)  3
D)  4E) B) and C)
F) All of the above

Question 17

Which of the following does not influence the time necessary for a nerve impulse to be transmitted?

Accepted Answer

A)  length of the axon
B)  presence or absence of a myelin sheath
C)  diameter of the axon
D)  presence or absence of nodes
E)  whether or not the impulse begins in the CNSF) B) and E)
G) A) and D)

Question 18

Figure 12-1 The Neuron
Use Figure 12-1 to answer the following questions:
-The structures labeled "1" are dendrites.Their membranes contain numerous chemically-gated ion channels.

Accepted Answer

A)  The first statement is true but the second statement is false.
B)  The first statement is false but the second statement is true.
C)  Both statements are true.
D)  Both statements are false.
E)  Both statements are true and relate to synaptic transmission.F) B) and C)
G) None of the above

Question 19

When a second EPSP arrives at a single synapse before the effects of the first have disappeared,what occurs?

Accepted Answer

A)  spatial summation
B)  temporal summation
C)  inhibition of the impulse
D)  hyperpolarization
E)  decrease in speed of impulse transmissionF) B) and E)
G) D) and E)

Question 20

Products from the soma of a neuron are transported to the synaptic terminals by ________ axoplasmic transport.

Accepted Answer

The answer of Products from the soma of a neuron...

Exam 12: Neural Tissue

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

Correct AnswerverifiedShow Answer

If the sodium-potassium pumps in the plasma membrane fail to function,all of the following occur,except

Correct AnswerverifiedShow Answer

Figure 12-2 The Nerve Action Potential Use Figure 12-2 to answer the following questions: -Which point of the graph shows when potassium ion outflow exceeds sodium ion inflow?

Correct AnswerverifiedShow Answer

A shift of the resting transmembrane potential toward 0 mV is called ________.

Correct AnswerverifiedShow Answer

The basic functional unit of the nervous system is the ________.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following does not influence the time necessary for a nerve impulse to be transmitted?

Correct AnswerverifiedShow Answer

The sodium-potassium ion exchange pump

Correct AnswerverifiedShow Answer

Figure 12-1 The Neuron Use Figure 12-1 to answer the following questions: -The structures labeled "1" are dendrites.Their membranes contain numerous chemically-gated ion channels.

Correct AnswerverifiedShow Answer

________ line the brain ventricles and spinal canal.

Correct AnswerverifiedShow Answer

The cytoplasm that surrounds the nucleus of a neuron is called the

Correct AnswerverifiedShow Answer

Products from the soma of a neuron are transported to the synaptic terminals by ________ axoplasmic transport.

Correct AnswerverifiedShow Answer

If the axon terminal of a motor neuron suddenly became permeable to calcium ion,

Correct AnswerverifiedShow Answer

________ carry motor information to peripheral effectors.(Note: Be sure to capitalize the first letter of your answer).

Correct AnswerverifiedShow Answer

What triggers the release of acetylcholine from a synaptic terminal?

Correct AnswerverifiedShow Answer

________ neurons are small and have no anatomical features that distinguish dendrites from axons.

Correct AnswerverifiedShow Answer

When a second EPSP arrives at a single synapse before the effects of the first have disappeared,what occurs?

Correct AnswerverifiedShow Answer

Figure 12-1 The Neuron Use Figure 12-1 to answer the following questions: -Which type of membrane channels are found at label "3"?

Correct AnswerverifiedShow Answer

A movement of charges in response to a potential difference is called a ________.

Correct AnswerverifiedShow Answer

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