Question 1

What type of circuit is used to maintain body posture while walking?

Accepted Answer

A)   Converging
B)   Diverging
C)   Reverberating
D)   Parallel-after-discharge
E)   None of the choices is correct.F) B) and E)
G) A) and D)

Question 2

A nerve cell that has dendrites but no axons is categorized as a(n) ________ neuron.

Accepted Answer

The answer of A nerve cell that has dendrites but...

Question 3

Which functional class of neurons lies entirely within the central nervous system?

Accepted Answer

A)   Bipolar neurons
B)   Sensory neurons
C)   Interneurons
D)   Unipolar neurons
E)   Motor neuronsF) A) and E)
G) D) and E)

Question 4

Following damage to axons nearby, oligodendrocytes

Accepted Answer

A)   secrete growth factors.
B)   do not secrete any chemicals.
C)   secrete growth-inhibitory molecules.
D)   grow their own fibers to occupy the space.E) None of the above
F) All of the above

Question 5

As the distance between a damaged axon and its receptor organ increases, the possibility of repair increases.

Accepted Answer

A) True 
 B)False

Question 6

Nerve impulses are transmitted only along exposed portions of an axon.

Accepted Answer

A) True 
 B)False

Question 7

What effect would an acetylcholinesterase inhibitor have on an acetylcholine synapse? Describe how you think it would influence muscle function. What effect do serotonin reuptake inhibitors have on serotonin synapses? Describe how you think they influence mood.

Accepted Answer

Ach E inhibitors cause more Ach to be in...

Question 8

As it moves from the tip of a dendrite to the axon hillock, a postsynaptic potential will maintain a constant amplitude.

Accepted Answer

A) True 
 B)False

Question 9

The type of transport protein that moves a substance down its concentration gradient is a

Accepted Answer

A)   channel.
B)   pump.C) A) and B)
D) undefined

Question 10

With damage to nerve fibers, larger distances between the site of damage and the target structure innervated result in ________ chances of successful regeneration.

Accepted Answer

A)   increased
B)   decreasedC) A) and B)
D) undefined

Question 11

The glial cell that helps to circulate cerebrospinal fluid is the

Accepted Answer

A)   astrocyte.
B)   ependymal cell.
C)   neurolemmocyte.
D)   microglial cell.
E)   oligodendrocyte.F) A) and E)
G) B) and D)

Question 12

The periphery of a myelinating neurolemmocyte that contains its cytoplasm and nucleus is called the ________.

Accepted Answer

The answer of The periphery of a myelinating neurolemmocyte that...

Question 13

When voltage-gated K+ channels open on the conductive segment of a neuron,

Accepted Answer

A)   potassium exits, repolarizing the cell to a negative value.
B)   potassium exits, depolarizing the cell to an even more negative value.
C)   potassium enters, depolarizing the cell to a positive value.
D)   potassium enters, repolarizing the cell to a negative value.
E)   potassium enters, repolarizing the cell to a positive value.F) B) and D)
G) None of the above

Question 14

The glossy-white appearance of most axons is due to

Accepted Answer

A)   the high lipid content of the myelin sheath.
B)   their proximity to light-reflecting cartilage.
C)   their proximity to white bone.
D)   the white color of the perivascular feet.
E)   the covering of ependymal cells.F) B) and D)
G) A) and B)

Question 15

When a single presynaptic neuron repeatedly releases neurotransmitter in a very short period of time, it results in ________ summation in the postsynaptic neuron.

Accepted Answer

The answer of When a single presynaptic neuron repeatedly releases...

Question 16

Voltage-gated potassium channels in a neuron's axon are triggered to open when membrane potential becomes more negative.

Accepted Answer

A) True 
 B)False

Question 17

Based on structure, the most common type of neuron is the ________ neuron.

Accepted Answer

A)   multipolar
B)   bipolar
C)   unipolar
D)   pseudounipolarE) B) and D)
F) A) and D)

Question 18

Where are synaptic knobs located?

Accepted Answer

A)   At the distal ends of an axons
B)   At the ends of dendrites
C)   Within the cell body
D)   Along axon collaterals
E)   At the axon hillockF) C) and D)
G) D) and E)

Question 19

The endoneurium is composed of

Accepted Answer

A)   dense regular connective tissue.
B)   simple squamous epithelium.
C)   dense irregular connective tissue.
D)   areolar connective tissue.
E)   pseudostratified nonkeratinized epithelium.F) D) and E)
G) B) and D)

Question 20

The type of neuronal circuit in which several nerve impulses come together at a single postsynaptic neuron is a ________ circuit.

Accepted Answer

A)   converging
B)   diverging
C)   reverberating
D)   parallel-after-discharge
E)   None of the choices is correct.F) C) and D)
G) A) and B)

Exam 12: Nervous System: Nervous Tissue

What type of circuit is used to maintain body posture while walking?

Correct AnswerverifiedShow Answer

Which functional class of neurons lies entirely within the central nervous system?

Correct AnswerverifiedShow Answer

The type of neuronal circuit in which several nerve impulses come together at a single postsynaptic neuron is a ________ circuit.

Correct AnswerverifiedShow Answer

Where are synaptic knobs located?

Correct AnswerverifiedShow Answer

Voltage-gated potassium channels in a neuron's axon are triggered to open when membrane potential becomes more negative.

Correct AnswerverifiedShow Answer

When a single presynaptic neuron repeatedly releases neurotransmitter in a very short period of time, it results in ________ summation in the postsynaptic neuron.

Correct AnswerverifiedShow Answer

The glial cell that helps to circulate cerebrospinal fluid is the

Correct AnswerverifiedShow Answer

The periphery of a myelinating neurolemmocyte that contains its cytoplasm and nucleus is called the ________.

Correct AnswerverifiedShow Answer

Nerve impulses are transmitted only along exposed portions of an axon.

Correct AnswerverifiedShow Answer

The endoneurium is composed of

Correct AnswerverifiedShow Answer

Based on structure, the most common type of neuron is the ________ neuron.

Correct AnswerverifiedShow Answer

The glossy-white appearance of most axons is due to

Correct AnswerverifiedShow Answer

With damage to nerve fibers, larger distances between the site of damage and the target structure innervated result in ________ chances of successful regeneration.

Correct AnswerverifiedShow Answer

When voltage-gated K+ channels open on the conductive segment of a neuron,

Correct AnswerverifiedShow Answer

A nerve cell that has dendrites but no axons is categorized as a(n) ________ neuron.

Correct AnswerverifiedShow Answer

As the distance between a damaged axon and its receptor organ increases, the possibility of repair increases.

Correct AnswerverifiedShow Answer

What effect would an acetylcholinesterase inhibitor have on an acetylcholine synapse? Describe how you think it would influence muscle function. What effect do serotonin reuptake inhibitors have on serotonin synapses? Describe how you think they influence mood.

Correct AnswerverifiedAch E inhibitors cause more Ach to be in...View AnswerShow Answer

The type of transport protein that moves a substance down its concentration gradient is a

Correct AnswerverifiedShow Answer

Following damage to axons nearby, oligodendrocytes

Correct AnswerverifiedShow Answer

As it moves from the tip of a dendrite to the axon hillock, a postsynaptic potential will maintain a constant amplitude.

Correct AnswerverifiedShow Answer

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When voltage-gated K⁺ channels open on the conductive segment of a neuron,

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Ach E inhibitors cause more Ach to be in...
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