Question 1

Which of the following is mismatched?

Accepted Answer

A)   microglia - provide support for the neuron cell body
B)   astrocytes - blood-brain barrier
C)   oligodendrocytes - form myelin sheaths
D)   ependymal cells - produce cerebrospinal fluid
E)   ependymal cells - choroid plexusF) A) and E)
G) C) and E)

Question 2

Gray matter on the surface of the brain is/are called

Accepted Answer

A)   the cortex.
B)   nuclei.
C)   ganglia.
D)   tracts.E) A) and D)
F) C) and D)

Question 3

Nerve fibers are also called ____________.

Accepted Answer

The answer of Nerve fibers are also called ____________....

Question 4

Match the neuroglial cell with its function.
-microglia

Accepted Answer

A)  influence function of blood-brain barrier
B)  macrophages in CNS
C)  produce cerebrospinal fluid
D)  form myelin sheath around axons in CNS
E)  form myelin sheath around part of the axon in the PNSF) All of the above
G) C) and D)

Question 5

Damage to a postsynaptic membrane would

Accepted Answer

A)   increase neurotransmitter release.
B)   decrease the release of neurotransmitter.
C)   increase neurotransmitter production.
D)   interfere with the ability to respond to neurotransmitter.
E)   destroy vesicles containing neurotransmitter.F) A) and D)
G) A) and B)

Question 6

When two or more presynaptic neurons synapse with a single postsynaptic neuron in the CNS, a(n)  _______ pathway is formed.

Accepted Answer

A)   convergent
B)   divergent
C)   reverberating
D)   somatic
E)   sensoryF) A) and C)
G) C) and D)

Question 7

-Identify structure "B" on the neuron.

Accepted Answer

A)   Schwann cell
B)   Node of Ranvier
C)   neuron cell body (soma) 
D)   dendrites
E)   axonF) B) and E)
G) A) and B)

Question 8

The junction between two neurons is a

Accepted Answer

A)   ganglia.
B)   synapse.
C)   fascicle.
D)   node of Ranvier.
E)   neuromuscular junction.F) A) and B)
G) D) and E)

Question 9

The plasma membrane of a neuron is more permeable to potassium ions because

Accepted Answer

A)   of its positive electrical charge.
B)   there are more leak ion channels for K+ than Na+.
C)   protein molecules cannot exit through the cell membrane.
D)   calcium ions block Na+ and Cl- channels.
E)   there are more leak ion channels for Na+ than K+.F) D) and E)
G) C) and D)

Question 10

-The figure illustrates the Action Potential. What does "A" represent?

Accepted Answer

A)   repolarization
B)   depolarization
C)   local potential
D)   threshold
E)   afterpotentialF) B) and D)
G) C) and D)

Question 11

For the resting membrane potential, increasing the sodium ion concentration in the ECF results in

Accepted Answer

A)   hyperpolarization.
B)   depolarization.
C)   hypopolarization.
D)   little change in membrane potential.
E)   There is not enough information to determine the results.F) B) and E)
G) A) and B)

Question 12

What inhibitory neurotransmitter is blocked in strychnine poisoning?

Accepted Answer

A)   glycine
B)   acetylcholine
C)   glutamate
D)   adenosineE) None of the above
F) B) and D)

Question 13

The absolute refractory period ends when

Accepted Answer

A)   inactivation gates of voltage-gated Na+ ion channels reopen.
B)   activation gates of voltage-gates Na+ ion channels reopen.
C)   the sodium-potassium exchange pump stops.
D)   voltage-gated K+ channels open.
E)   None of these choices is correct.F) C) and D)
G) A) and D)

Question 14

Synaptic vesicles contain neurotransmitters and are present in the

Accepted Answer

A)   dendrites.
B)   cell body.
C)   axolemma.
D)   presynaptic terminals.
E)   trigger zone.F) A) and D)
G) B) and D)

Question 15

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) B) and C)
F) None of the above

Question 16

Gap junctions are functional __________ synapses.

Accepted Answer

A)   chemical
B)   electrical
C)   potential
D)   intracellular
E)   neuromuscularF) B) and D)
G) A) and E)

Question 17

Which of the following statements regarding voltage-gated K+ channels is true?

Accepted Answer

A)   These channels have only one gate.
B)   These channels open more slowly than Na+ channels.
C)   Once open, these channels remain open until repolarization is complete.
D)   These channels are specific for potassium.
E)   All of these statements are true.F) None of the above
G) B) and C)

Question 18

Match the following concerning concentration differences across the plasma membrane.
-higher inside cell

Accepted Answer

A)  concentration of potassium
B)  concentration of sodium and chloride
C)  negatively charged proteins
D)  sodium/potassium pump
E)  plasma membrane is more permeable to this ion because of leak ion channelsF) B) and D)
G) A) and B)

Question 19

-The figure is a process figure of the chemical synapse. What does "D" represent?

Accepted Answer

A)   postsynaptic membrane
B)   synaptic cleft
C)   synaptic vesicle
D)   voltage-gated calcium channel
E)   presynaptic terminalF) C) and D)
G) A) and B)

Question 20

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

Accepted Answer

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

Exam 11: Functional Organization of Nervous Tissue

Match the neuroglial cell with its function. -microglia

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Gap junctions are functional __________ synapses.

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

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Which of the following statements regarding voltage-gated K+ channels is true?

Correct AnswerverifiedShow Answer

The plasma membrane of a neuron is more permeable to potassium ions because

Correct AnswerverifiedShow Answer

Match the following concerning concentration differences across the plasma membrane. -higher inside cell

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The junction between two neurons is a

Correct AnswerverifiedShow Answer

-The figure is a process figure of the chemical synapse. What does "D" represent?

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Nerve fibers are also called ____________.

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Which of the following is mismatched?

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What inhibitory neurotransmitter is blocked in strychnine poisoning?

Correct AnswerverifiedShow Answer

Synaptic vesicles contain neurotransmitters and are present in the

Correct AnswerverifiedShow Answer

Gray matter on the surface of the brain is/are called

Correct AnswerverifiedShow Answer

The absolute refractory period ends when

Correct AnswerverifiedShow Answer

Damage to a postsynaptic membrane would

Correct AnswerverifiedShow Answer

When two or more presynaptic neurons synapse with a single postsynaptic neuron in the CNS, a(n) _______ pathway is formed.

Correct AnswerverifiedShow Answer

Saltatory conduction of an action potential means that

Correct AnswerverifiedShow Answer

For the resting membrane potential, increasing the sodium ion concentration in the ECF results in

Correct AnswerverifiedShow Answer

-Identify structure "B" on the neuron.

Correct AnswerverifiedShow Answer

-The figure illustrates the Action Potential. What does "A" represent?

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