Question 1

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 C)
F) B) and C)

Question 2

Nerve impulses leading to the skeletal muscle carry information to direct movement.The nerve fibers sending these signals will most likely belong to which division of the nervous system?

Accepted Answer

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

Question 3

Because all action potentials are alike,how does the brain separate situations that require immediate attention from ordinary "positional" reports?

Accepted Answer

The importance of a stimulus is derived ...

Question 4

Cell bodies of sensory neurons may be located in ganglia lying outside the central nervous system.

Accepted Answer

A) True 
 B)False

Question 5

A second nerve impulse cannot be generated until ________.

Accepted Answer

A)  all sodium gates are closed
B)  the membrane potential has been reestablished
C)  the Na ions have been pumped back into the cell
D)  proteins have been resynthesizedE) A) and B)
F) All of the above B

Question 6

Immediately after an action potential has peaked,which of the following channels will open?

Accepted Answer

A)  voltage gated calcium channels
B)  chemically gated chloride channels
C)  voltage gated potassium channels
D)  voltage gated sodium channelsE) None of the above
F) A) and C) C

Question 7

What is the difference between a direct acting neurotransmitter and an indirect acting neurotransmitter?

Accepted Answer

Direct acting neurotransmitter...

Question 8

What does the central nervous system use to determine the strength of a stimulus?

Accepted Answer

A)  size of action potentials
B)  origin of the stimulus
C)  type of stimulus receptor
D)  frequency of action potentialsE) None of the above
F) B) and D)

Question 9

Saltatory conduction is made possible by ________.

Accepted Answer

A)  erratic transmission of nerve impulses
B)  diphasic impulses
C)  large nerve fibers
D)  the myelin sheathE) None of the above
F) A) and B)

Question 10

During the relative refractory period of an action potential,a larger than normal stimulus is needed to cause another action potential.This is due to the fact that ________.

Accepted Answer

A)  the voltage gated potassium ion channels remain open long enough to hyperpolarize the axon membrane
B)  the membrane is now impermeable to all ions
C)  the sodium potassium pump will stop working during relative refractory
D)  the inactivation gates on voltage gated sodium ion channels are closedE) None of the above
F) C) and D)

Question 11

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

Accepted Answer

A) True 
 B)False

Question 12

If a post synaptic cell is stimulated to threshold by temporal summation this implies that ________.

Accepted Answer

A)  the postsynaptic cell can be influenced by only one presynaptic cell
B)  the postsynaptic cell is sending frequent action potential
C)  a presynaptic neuron is sending frequent EPSP
D)  the presynaptic neuron is sending frequent IPSPE) A) and C)
F) A) and B)

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,mic...

Question 14

Which of the following describes the excitatory postsynaptic potential?

Accepted Answer

A)  moves membrane potential away from threshold
B)  opens K+ or Cl- channels
C)  short distance depolarization
D)  short distance hyperpolarizationE) C) and D)
F) None of the above

Question 15

Nerve impulses leading to the brain carry information about cool temperatures on the skin.The nerve fibers sending these signals will most likely belong to which division of the nervous system?

Accepted Answer

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

Question 16

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

Accepted Answer

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

Question 17

When a neurotransmitter like GABA is acting in an inhibitory manner which of the following is likely a result of the GABA acting on the post synaptic cell?

Accepted Answer

A)  influx of positively charged ions into the postsynaptic cell
B)  opening of chemically gated sodium channels
C)  depolarization of the postsynaptic cell membrane
D)  hyperpolarization of the postsynaptic cell membraneE) A) and C)
F) None of the above D

Question 18

A chemical messenger that does not directly cause ESPSs or IPSPs but does affect the strength of synaptic transmission is a ________.

Accepted Answer

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

Question 19

Schwann cells are functionally similar to ________.

Accepted Answer

A)  astrocytes
B)  microglia
C)  ependymal cells
D)  oligodendrocytesE) A) and B)
F) A) and C)

Question 20

Which of the choices below describes the ANS?

Accepted Answer

A)  motor fibers that conduct nerve impulses from the CNS to smooth muscle,cardiac muscle,and glands
B)  motor fibers that conduct nerve impulses from the CNS to skeletal muscles
C)  sensory and motor neurons that supply the digestive tract
D)  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 CNSE) A) and D)
F) B) and C)

Exam 11: Fundamentals of the Nervous System and Nervous Tissue

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

Nerve impulses leading to the skeletal muscle carry information to direct movement.The nerve fibers sending these signals will most likely belong to which division of the nervous system?

Correct AnswerverifiedShow Answer

Because all action potentials are alike,how does the brain separate situations that require immediate attention from ordinary "positional" reports?

Correct AnswerverifiedThe importance of a stimulus is derived ...View AnswerShow Answer

Cell bodies of sensory neurons may be located in ganglia lying outside the central nervous system.

Correct AnswerverifiedShow Answer

A second nerve impulse cannot be generated until ________.

Correct AnswerverifiedB

Immediately after an action potential has peaked,which of the following channels will open?

Correct AnswerverifiedC

What is the difference between a direct acting neurotransmitter and an indirect acting neurotransmitter?

Correct AnswerverifiedDirect acting neurotransmitter...View AnswerShow Answer

What does the central nervous system use to determine the strength of a stimulus?

Correct AnswerverifiedShow Answer

Saltatory conduction is made possible by ________.

Correct AnswerverifiedShow Answer

During the relative refractory period of an action potential,a larger than normal stimulus is needed to cause another action potential.This is due to the fact that ________.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

If a post synaptic cell is stimulated to threshold by temporal summation this implies that ________.

Correct AnswerverifiedShow Answer

What is the role of microglial cells and why are they so important in the CNS?

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

Which of the following describes the excitatory postsynaptic potential?

Correct AnswerverifiedShow Answer

Nerve impulses leading to the brain carry information about cool temperatures on the skin.The nerve fibers sending these signals will most likely belong to which division of the nervous system?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

When a neurotransmitter like GABA is acting in an inhibitory manner which of the following is likely a result of the GABA acting on the post synaptic cell?

Correct AnswerverifiedD

A chemical messenger that does not directly cause ESPSs or IPSPs but does affect the strength of synaptic transmission is a ________.

Correct AnswerverifiedShow Answer

Schwann cells are functionally similar to ________.

Correct AnswerverifiedShow Answer

Which of the choices below describes the ANS?

Correct AnswerverifiedShow Answer

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The importance of a stimulus is derived ...
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Direct acting neurotransmitter...
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In the presence of invading microbes,mic...
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D

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