Question 1

Match the term with the correct definition.
-Repolarization

Accepted Answer

A)  Small change in the resting membrane potential confined to a small area
B)  Charge difference across the plasma membrane when the cell is in an unstimulated state
C)  Larger change in resting membrane potential that spreads over entire surface of a cell
D)  Membrane becomes more positive when Na+ diffuse into cell
E)  Return to the resting membrane potentialF) A) and E)
G) None of the above

Question 2

The junction between two neurons is a ________.

Accepted Answer

A)   ganglia
B)   synapse
C)   fascicle
D)   node of Ranvier
E)   neuromuscular junctionF) A) and E)
G) C) and D)

Question 3

An IPSP is inhibitory because it

Accepted Answer

A)   changes the threshold of the neuron.
B)   hyperpolarizes the postsynaptic membrane.
C)   prevents Ca2+ entry into the presynaptic terminal.
D)   reduces the amount of neurotransmitter released by the presynaptic terminal.
E)   depolarizes the postsynaptic membrane.F) A) and C)
G) B) and C)

Question 4

Identify the mechanisms by which neuromodulators alter synaptic transmission. (Check all that apply.)

Accepted Answer

A)   Changing neurotransmitter receptor numbers
B)   Increasing amounts of neurotransmitter released
C)   Affecting breakdown of neurotransmitters
D)   Affecting the removal of neurotransmittersE) All of the above
F) B) and C)

Question 5

A neuromodulator

Accepted Answer

A)   acts as a neurotransmitter.
B)   inactivates neurotransmitters.
C)   is a receptor site for a neurotransmitter.
D)   has no influence on the amount of neurotransmitter released.
E)   is a substance released from neurons that influences the sensitivity of neurons to neurotransmitters.F) B) and D)
G) A) and D)

Question 6

Saltatory conduction of an action potential means that

Accepted Answer

A)   once one action potential is created, it moves down the axon.
B)   the whole axon depolarizes at the same time.
C)   one action potential stimulates the production of a new action potential at the adjacent site.
D)   an action potential is conducted from one node of Ranvier to the next node.E) A) and B)
F) B) and D)

Question 7

Which of the following is NOT true about astrocytes?

Accepted Answer

A)   They can wall off an injury site to prevent spread of inflammation.
B)   They can prevent toxic substances from entering brain tissue.
C)   They can release chemicals that promote formation of synapses.
D)   They can aid in the regeneration of injured neurons.E) None of the above
F) C) and D)

Question 8

Multiple sclerosis is a neurological disorder in which myelin sheaths in the CNS are destroyed. Which of the following neuroglial cells is being damaged in multiple sclerosis?

Accepted Answer

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

Question 9

-The figure illustrates events at a chemical synapse. What does "B" represent?
A) Postsynaptic membrane
B) Synaptic cleft
C) Synaptic vesicle
D) Voltage-gated Ca2+ channel
E) Presynaptic terminal

Accepted Answer

Question 10

-The figure illustrates events at a chemical synapse. What does "C" represent?
A) Postsynaptic membrane
B) Synaptic cleft
C) Synaptic vesicle
D) Voltage-gated Ca2+ channel
E) Presynaptic terminal

Accepted Answer

Question 11

________ are processes that conduct electric signals toward the cell body.

Accepted Answer

The answer of ________ are processes that conduct electric signals...

Question 12

-Identify structure "A" on the neuron.
A) Schwann cell
B) Node of Ranvier
C) Neuron cell body (soma)
D) Dendrites
E) Axon

Accepted Answer

The answer of 
-Identify structure "A" on the neuron.
A) Schwann...

Exam 11: Functional Organization of Nervous Tissue

Saltatory conduction of an action potential means that

Correct Answer
verified

Which of the following is NOT true about astrocytes?

Correct Answer
verified

-The figure illustrates events at a chemical synapse. What does "B" represent? A) Postsynaptic membrane B) Synaptic cleft C) Synaptic vesicle D) Voltage-gated Ca²⁺ channel E) Presynaptic terminal

Correct Answer
verified

-Identify structure "A" on the neuron. A) Schwann cell B) Node of Ranvier C) Neuron cell body (soma) D) Dendrites E) Axon

Correct Answer
verified

________ are processes that conduct electric signals toward the cell body.

Correct Answer
verified

Match the term with the correct definition. -Repolarization

Correct Answer
verified

Multiple sclerosis is a neurological disorder in which myelin sheaths in the CNS are destroyed. Which of the following neuroglial cells is being damaged in multiple sclerosis?

Correct Answer
verified

A neuromodulator

Correct Answer
verified

-The figure illustrates events at a chemical synapse. What does "C" represent? A) Postsynaptic membrane B) Synaptic cleft C) Synaptic vesicle D) Voltage-gated Ca²⁺ channel E) Presynaptic terminal

Correct Answer
verified

Identify the mechanisms by which neuromodulators alter synaptic transmission. (Check all that apply.)

Correct Answer
verified

An IPSP is inhibitory because it

Correct Answer
verified

The junction between two neurons is a ________.

Correct Answer
verified

Exam 11: Functional Organization of Nervous Tissue

Saltatory conduction of an action potential means that

Correct AnswerverifiedShow Answer

Which of the following is NOT true about astrocytes?

Correct AnswerverifiedShow Answer

-The figure illustrates events at a chemical synapse. What does "B" represent? A) Postsynaptic membrane B) Synaptic cleft C) Synaptic vesicle D) Voltage-gated Ca2+ channel E) Presynaptic terminal

Correct AnswerverifiedShow Answer

-Identify structure "A" on the neuron. A) Schwann cell B) Node of Ranvier C) Neuron cell body (soma) D) Dendrites E) Axon

Correct AnswerverifiedShow Answer

________ are processes that conduct electric signals toward the cell body.

Correct AnswerverifiedShow Answer

Match the term with the correct definition. -Repolarization

Correct AnswerverifiedShow Answer

Multiple sclerosis is a neurological disorder in which myelin sheaths in the CNS are destroyed. Which of the following neuroglial cells is being damaged in multiple sclerosis?

Correct AnswerverifiedShow Answer

A neuromodulator

Correct AnswerverifiedShow Answer

-The figure illustrates events at a chemical synapse. What does "C" represent? A) Postsynaptic membrane B) Synaptic cleft C) Synaptic vesicle D) Voltage-gated Ca2+ channel E) Presynaptic terminal

Correct AnswerverifiedShow Answer

Identify the mechanisms by which neuromodulators alter synaptic transmission. (Check all that apply.)

Correct AnswerverifiedShow Answer

An IPSP is inhibitory because it

Correct AnswerverifiedShow Answer

The junction between two neurons is a ________.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

-The figure illustrates events at a chemical synapse. What does "B" represent? A) Postsynaptic membrane B) Synaptic cleft C) Synaptic vesicle D) Voltage-gated Ca²⁺ channel E) Presynaptic terminal

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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-The figure illustrates events at a chemical synapse. What does "C" represent? A) Postsynaptic membrane B) Synaptic cleft C) Synaptic vesicle D) Voltage-gated Ca²⁺ channel E) Presynaptic terminal

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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