Question 1

The concentration of ions in the chemical environment surrounding the neurons must be tightly regulated for neurons to function properly. Which of the following cells is mostresponsible for this?

Accepted Answer

A)   satellite cells
B)   astrocytes
C)   Schwann cells
D)   oligodendrocytesE) A) and B)
F) A) and C)

Question 2

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 arecharacterized by periods of remission and exacerbation.

Accepted Answer

Even though someone is diagnosed with MS...

Question 3

Which of the following is not characteristic of neurons?

Accepted Answer

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

Question 4

Cranial nerve II, the optic nerve sends nerve impulses to the brain carrying information about the things we see. These nerve fibers most likely belong to which division of the nervoussystem?

Accepted Answer

A)   sensory (afferent)  division
B)   somatic nervous system
C)   sympathetic division
D)   parasympathetic divisionE) B) and D)
F) A) and B)

Question 5

Neurons in the CNS are organized into functional groups.

Accepted Answer

A) True 
 B)False

Question 6

At the biochemical level, what is the explanation of the hyperpolarization phase at the conclusion of the action potential?

Accepted Answer

The voltage gated K+ channels are slow t...

Question 7

Unipolar neurons have axons structurally divided into peripheral and central processes.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following will occur when an excitatory postsynaptic potential (EPSP)  is being generated on the dendritic membrane?

Accepted Answer

A)   Specific sodium gates will open.
B)   Sodium gates will open first, then close as potassium gates open.
C)   A single type of channel will open, permitting simultaneous flow of sodium and potassium.
D)   Specific potassium gates will open.E) All of the above
F) None of the above

Question 9

Select the correct statement regarding chemical synapses.

Accepted Answer

A)   The release of neurotransmitter molecules gives cells the property of being electrically coupled.
B)   Neurotransmitter receptors are located on the axons terminals of cells.
C)   The synaptic cleft uses the action potential to transmit a chemical signal to the post synaptic cell.
D)   Cells with gap junctions use chemical synapses.E) B) and C)
F) C) and D)

Question 10

Axon diameter and degree of myelination determine nerve impulse conduction velocity.

Accepted Answer

A) True 
 B)False

Question 11

A chemical messenger that does not directly cause ESPSs or IPSPs but does affect the strength of synaptictransmission is a________.

Accepted Answer

The answer of A chemical messenger that does not directly...

Question 12

The period after an initial stimulus when a neuron is not sensitive to another stimulus is the________.

Accepted Answer

A)   repolarization
B)   depolarization
C)   resting period
D)   absolute refractory periodE) C) and D)
F) B) and D)

Question 13

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

Which of the following is false or incorrect?

Accepted Answer

A)   A nerve impulse occurs if the excitatory and inhibitory effects are equal.
B)   An excitatory postsynaptic potential occurs if the excitatory effect is greater than the inhibitory effect but less than threshold.
C)   An inhibitory postsynaptic potential occurs if the inhibitory effect is greater than the excitatory, causing hyperpolarization of the membrane.D) A) and B)
E) A) and C)

Question 15

Reflexes are rapid, automatic responses to stimuli that will produce the same effect every time.

Accepted Answer

A) True 
 B)False

Question 16

Which of the choices below describes the ANS?

Accepted Answer

A)   motor fibers that conduct nerve impulses from the CNS to skeletal muscles
B)   sensory neurons that convey information from somatic receptors in the head, body wall, and limbs and from receptors from the special senses of vision, hearing, taste, and smell to the CNS
C)   motor fibers that conduct nerve impulses from the CNS to smooth muscle, cardiac muscle, and glands
D)   sensory and motor neurons that supply the digestive tractE) None of the above
F) A) and C)

Question 17

Saltatory conduction is made possible by________.

Accepted Answer

A)   diphasic impulses
B)   the myelin sheath
C)   erratic transmission of nerve impulses
D)   large nerve fibersE) A) and B)
F) A) and C)

Question 18

During depolarization, the inside of the neuron's membrane becomes less negative.

Accepted Answer

A) True 
 B)False

Question 19

If a post synaptic neuron is stimulated to threshold by spatial summation this implies that________.

Accepted Answer

A)   the post synaptic cell is slow to repolarize
B)   the postsynaptic cells has many synapses with many presynaptic neurons
C)   the post synaptic cell has a lower than normal threshold
D)   the post synaptic cell has many voltage gated ion channelsE) C) and D)
F) B) and C)

Question 20

Meningitis can be caused by infection of the central nervous system by bacteria. Which cells would be most responsible for removing the infection?

Accepted Answer

A)   Schwann cells
B)   oligodendrocytes
C)   microglia
D)   satellite cellsE) A) and D)
F) A) and C)

Exam 11: Fundamentals of the Nervous System and Nervous Tissue

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 arecharacterized by periods of remission and exacerbation.

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

Unipolar neurons have axons structurally divided into peripheral and central processes.

Correct AnswerverifiedShow Answer

Saltatory conduction is made possible by________.

Correct AnswerverifiedShow Answer

Meningitis can be caused by infection of the central nervous system by bacteria. Which cells would be most responsible for removing the infection?

Correct AnswerverifiedShow Answer

Select the correct statement regarding chemical synapses.

Correct AnswerverifiedShow Answer

Which of the following is not characteristic of neurons?

Correct AnswerverifiedShow Answer

Neurons in the CNS are organized into functional groups.

Correct AnswerverifiedShow Answer

The concentration of ions in the chemical environment surrounding the neurons must be tightly regulated for neurons to function properly. Which of the following cells is mostresponsible for this?

Correct AnswerverifiedShow Answer

A chemical messenger that does not directly cause ESPSs or IPSPs but does affect the strength of synaptictransmission is a________.

Correct AnswerverifiedShow Answer

During depolarization, the inside of the neuron's membrane becomes less negative.

Correct AnswerverifiedShow Answer

At the biochemical level, what is the explanation of the hyperpolarization phase at the conclusion of the action potential?

Correct AnswerverifiedThe voltage gated K+ channels are slow t...View AnswerShow Answer

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

Which of the following will occur when an excitatory postsynaptic potential (EPSP) is being generated on the dendritic membrane?

Correct AnswerverifiedShow Answer

Cranial nerve II, the optic nerve sends nerve impulses to the brain carrying information about the things we see. These nerve fibers most likely belong to which division of the nervoussystem?

Correct AnswerverifiedShow Answer

If a post synaptic neuron is stimulated to threshold by spatial summation this implies that________.

Correct AnswerverifiedShow Answer

Reflexes are rapid, automatic responses to stimuli that will produce the same effect every time.

Correct AnswerverifiedShow Answer

Axon diameter and degree of myelination determine nerve impulse conduction velocity.

Correct AnswerverifiedShow Answer

Which of the choices below describes the ANS?

Correct AnswerverifiedShow Answer

Which of the following is false or incorrect?

Correct AnswerverifiedShow Answer

The period after an initial stimulus when a neuron is not sensitive to another stimulus is the________.

Correct AnswerverifiedShow Answer

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Even though someone is diagnosed with MS...
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The voltage gated K+ channels are slow t...
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In the presence of invading microbes, mi...
View Answer

Correct Answer
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