Question 1

A patient was admitted for depression. What should the nurse explain to the patient regarding the role of serotonin and depression?

Accepted Answer

Serotonin is a biogenic amine neurotrans...

Question 2

An inhibitory postsynaptic potential (IPSP)  is associated with .

Accepted Answer

A)   hyperpolarization
B)   opening of voltage- regulated channels
C)   a change in sodium ion permeability
D)   lowering the threshold for an action potential to occurE) B) and D)
F) A) and B)

Question 3

Which of the following is not a function of the autonomic nervous system?

Accepted Answer

A)   innervation of smooth muscle of the digestive tract
B)   innervation of glands
C)   innervation of cardiac muscle
D)   innervation of skeletal muscleE) A) and B)
F) None of the above

Question 4

Figure 11.1Using Figure 11.1, match the following:
-Which neuron is never myelinated?

Accepted Answer

The answer of  Figure 11.1Using Figure 11.1, match the...

Question 5

Which of the following is true about the movement of ions across excitable living membranes?

Accepted Answer

A)   Ions always move actively across membranes through leakage channels.
B)   Ions always move from an area of higher concentration to an area of lower concentration
C)   Sodium gates in the membrane can open in response to electrical potential changes.
D)   Ions always move passively across membranes.E) B) and C)
F) A) and C)

Question 6

Figure 11.1Using Figure 11.1, match the following:
-What is the difference between a direct acting neurotransmitter and an indirect acting neurotransmitter?

Accepted Answer

Direct acting neurotransmitter...

Question 7

Select the correct statement regarding synapses.

Accepted Answer

A)   Neurotransmitter receptors are located on the axons terminals of cells.
B)   The release of neurotransmitter molecules gives cells the property of being electrically coupled.
C)   The synaptic cleft prevents an impulse from being transmitted directly from one neuron to another.
D)   Cells with gap junctions use chemical synapses.E) C) and D)
F) All of the above

Question 8

Reflexes are rapid, automatic responses to stimuli.

Accepted Answer

A) True 
 B)False

Question 9

A stimulus traveling toward a synapse appears to open calcium ion channels at the presynaptic end, which in turn promotes fusion of synaptic vesicles to the axonal membrane.

Accepted Answer

A) True 
 B)False

Question 10

Figure 11.1Using Figure 11.1, match the following:
-Which neuron is a sensory neuron found in a reflex arc?

Accepted Answer

The answer of  Figure 11.1Using Figure 11.1, match the...

Question 11

A patient is admitted to the hospital with exacerbation of multiple sclerosis (MS). She asks the nurse, "Why did this have to happen to me again? I was doing so well." Explain why some forms of MS are characterized by periods of remission and exacerbation.

Accepted Answer

Even though someone is diagnosed with MS...

Question 12

Figure 11.1Using Figure 11.1, match the following:
-Imagine a neuron that has several hundred axonal knobs impinging on it. The majority of these axonal knobs are shown to be "firing." However, the neuron in question does not transmit an impulse. Give a valid explanation of why this could occur.

Accepted Answer

Both excitatory and inhibitory potential...

Question 13

Figure 11.1Using Figure 11.1, match the following:
-What is the role of microglial cells and why are they so important in the CNS?

Accepted Answer

In the presence of invading microbes, mi...

Question 14

The substance released at axon terminals to propagate a nervous impulse is called a(n)  .

Accepted Answer

A)   biogenic amine
B)   ion
C)   cholinesterase
D)   neurotransmitterE) A) and B)
F) None of the above

Question 15

In myelinated axons the voltage- regulated sodium channels are concentrated at the nodes of Ranvier.

Accepted Answer

A) True 
 B)False

Question 16

The period after an initial stimulus when a neuron is not sensitive to another stimulus is the
)

Accepted Answer

A)   absolute refractory period
B)   repolarization
C)   depolarization
D)   resting periodE) All of the above
F) B) and C)

Question 17

Which of the following neurotransmitters inhibits pain and is mimicked by morphine, heroin, and methadone?

Accepted Answer

A)   acetylcholine
B)   nitric oxide
C)   serotonin
D)   endorphinE) B) and D)
F) B) and C)

Question 18

Strong stimuli cause the amplitude of action potentials generated to increase.

Accepted Answer

A) True 
 B)False

Question 19

The oligodendrocytes can myelinate several axons.

Accepted Answer

A) True 
 B)False

Question 20

Which of the following is not characteristic of neurons?

Accepted Answer

A)   They have extreme longevity.
B)   They conduct impulses.
C)   They have an exceptionally high metabolic rate.
D)   They are mitotic.E) A) and D)
F) B) and C)

Exam 11: Fundamentals of the Nervous System and Nervous Tissue

The period after an initial stimulus when a neuron is not sensitive to another stimulus is the )

Correct AnswerverifiedShow Answer

A patient is admitted to the hospital with exacerbation of multiple sclerosis (MS). She asks the nurse, "Why did this have to happen to me again? I was doing so well." Explain why some forms of MS are characterized by periods of remission and exacerbation.

Correct AnswerverifiedEven though someone is diagnosed with MS...View AnswerShow Answer

In myelinated axons the voltage- regulated sodium channels are concentrated at the nodes of Ranvier.

Correct AnswerverifiedShow Answer

The substance released at axon terminals to propagate a nervous impulse is called a(n) .

Correct AnswerverifiedShow Answer

An inhibitory postsynaptic potential (IPSP) is associated with .

Correct AnswerverifiedShow Answer

Reflexes are rapid, automatic responses to stimuli.

Correct AnswerverifiedShow Answer

The oligodendrocytes can myelinate several axons.

Correct AnswerverifiedShow Answer

Figure 11.1Using Figure 11.1, match the following: -What is the role of microglial cells and why are they so important in the CNS?

Correct AnswerverifiedIn the presence of invading microbes, mi...View AnswerShow Answer

Figure 11.1Using Figure 11.1, match the following: -Which neuron is never myelinated?

Correct AnswerverifiedShow Answer

A patient was admitted for depression. What should the nurse explain to the patient regarding the role of serotonin and depression?

Correct AnswerverifiedSerotonin is a biogenic amine neurotrans...View AnswerShow Answer

Which of the following neurotransmitters inhibits pain and is mimicked by morphine, heroin, and methadone?

Correct AnswerverifiedShow Answer

Which of the following is not a function of the autonomic nervous system?

Correct AnswerverifiedShow Answer

Which of the following is true about the movement of ions across excitable living membranes?

Correct AnswerverifiedShow Answer

Select the correct statement regarding synapses.

Correct AnswerverifiedShow Answer

Figure 11.1Using Figure 11.1, match the following: -Imagine a neuron that has several hundred axonal knobs impinging on it. The majority of these axonal knobs are shown to be "firing." However, the neuron in question does not transmit an impulse. Give a valid explanation of why this could occur.

Correct AnswerverifiedBoth excitatory and inhibitory potential...View AnswerShow Answer

Which of the following is not characteristic of neurons?

Correct AnswerverifiedShow Answer

Strong stimuli cause the amplitude of action potentials generated to increase.

Correct AnswerverifiedShow Answer

A stimulus traveling toward a synapse appears to open calcium ion channels at the presynaptic end, which in turn promotes fusion of synaptic vesicles to the axonal membrane.

Correct AnswerverifiedShow Answer

Figure 11.1Using Figure 11.1, match the following: -Which neuron is a sensory neuron found in a reflex arc?

Correct AnswerverifiedShow Answer

Figure 11.1Using Figure 11.1, match the following: -What is the difference between a direct acting neurotransmitter and an indirect acting neurotransmitter?

Correct AnswerverifiedDirect acting neurotransmitter...View AnswerShow Answer

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Even though someone is diagnosed with MS...
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In the presence of invading microbes, mi...
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Serotonin is a biogenic amine neurotrans...
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Both excitatory and inhibitory potential...
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Direct acting neurotransmitter...
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