Question 1

A nerve is

Accepted Answer

A)  a neuron.
B)  composed of sensory axons and motor dendrites.
C)  composed of the long fibers of long axons.
D)  a part of the central nervous system.
E)  any cell located in the brain or spinal region.F) A) and C)
G) A) and B)

Question 2

When the dorsal root of a spinal nerve is cut,

Accepted Answer

A)  the organism is killed.
B)  incoming sensory nerve impulses are lost.
C)  outgoing motor nerve impulses are lost.
D)  incoming motor nerve impulses are lost.
E)  impulses do not cross over to the other side of the body.F) A) and E)
G) B) and E)

Question 3

Which of the following is NOT true about the cerebrum?

Accepted Answer

A)  It is the largest part of the human brain.
B)  The gray matter is the outermost.
C)  It is responsible for maintenance of breathing and heart rate.
D)  The two cerebral hemispheres are connected by the corpus callosum.
E)  Association areas integrate information from different lobes.F) A) and B)
G) A) and C)

Question 4

In dissection,most nerve fibers appear gray to white because

Accepted Answer

A)  the neuron is gray to white colored.
B)  sodium ions are part of the salt compound and they flow along the surface.
C)  they rapidly die and dead tissues soon become gray or white.
D)  they are mostly myelin sheath made of lipid or fat molecules.
E)  they consume large amounts of energy in the form of sugar.F) A) and D)
G) B) and E)

Question 5

Spinal nerves contain

Accepted Answer

A)  only sensory fibers.
B)  only motor fibers.
C)  both sensory and motor fibers.
D)  only parasympathetic fibers.
E)  only ganglia.F) B) and E)
G) C) and E)

Question 6

In the axon,the nerve impulses travel

Accepted Answer

A)  toward the cell body.
B)  away from the cell body.
C)  bidirectionally toward AND away from the cell body.
D)  away from the synapse.
E)  toward the dendrites.F) C) and E)
G) B) and E)

Question 7

A nerve impulse is caused by

Accepted Answer

A)  the movement of a sodium ion all the way from dendrite to axon tip.
B)  the movement of a potassium ion all the way from dendrite to axon tip.
C)  the movement of an electron all the way from dendrite to axon tip.
D)  a change in the difference in positive and negative ions on the outer and inner surfaces of the neuron membrane,a change that opens adjacent channels and propagates its flow.
E)  a change in the difference in sugar molecules on the outer and inner surfaces of the neuron membrane that opens adjacent channels.F) B) and C)
G) C) and D)

Question 8

Which structures are associated with the limbic system?

Accepted Answer

A)  cerebral lobes,basal nuclei,and diencephalon
B)  cerebral lobes,basal nuclei,and spinal cord
C)  cerebral lobes,peripheral nerves,and diencephalon
D)  cerebellum,basal nuclei,and diencephalon
E)  spinal cord,basal nuclei,and diencephalonF) C) and D)
G) C) and E)

Question 9

What are the two parts of the diencephalon?

Accepted Answer

A)  the cerebellum and the cerebrum
B)  the hypothalamus and the thalamus
C)  the midbrain and the pons
D)  the third and fourth ventricles
E)  the medulla oblongata and the brain stemF) B) and D)
G) C) and D)

Question 10

Which part of the brain contains centers for the heartbeat and respiration?

Accepted Answer

A)  medulla oblongata
B)  hypothalamus
C)  cerebellum
D)  cerebrum
E)  ponsF) A) and D)
G) D) and E)

Question 11

Which of the following is not a way that a drug affects the brain?

Accepted Answer

A)  cause the neurotransmitter to leak out of a synaptic vesicle into the axon terminal
B)  promote the release of the neurotransmitter into the synaptic cleft
C)  block the enzyme that causes breakdown of the neurotransmitter
D)  mimics the action of a neurotransmitter by binding to the receptor
E)  builds up along the outside of the brain because it cannot pass the blood-brain barrierF) B) and E)
G) None of the above

Question 12

Which brain structure serves as a bridge between the sensory association areas and the prefrontal area?

Accepted Answer

A)  hippocampus
B)  amygdala
C)  pons
D)  brain stem
E)  cerebellumF) B) and E)
G) A) and C)

Question 13

Generally,nerve impulses do not move "backward" along a series of neurons.What is the reason for this?

Accepted Answer

A)  There is a short refractory period during which sodium gates cannot open and an action potential cannot move backwards.
B)  Once the signal has passed,the nerves separate from each other so it cannot go backwards.
C)  At the synapse,the presynaptic membrane has receptors,ensuring the transmission only goes one way.
D)  Once the sodium channels open,they cannot be closed.
E)  The resting potential of the neuron prevents it from conducting an impulse.F) A) and E)
G) B) and D)

Question 14

The cerebrum is the largest portion of the brain in humans.

Accepted Answer

A) True 
 B)False

Question 15

Neurotransmitters are molecules that cross the synaptic cleft via

Accepted Answer

A)  active transport and always inhibit the postsynaptic neuron.
B)  acitve transport and always excite the postsynaptic neuron.
C)  passive diffusion and either excite or inhibit the postsynaptic neuron.
D)  passive diffusion and always inhibit the postsynaptic neuron.
E)  passive diffusion and always excite the postsynaptic neuron.F) A) and E)
G) None of the above

Question 16

Which of the following drugs is a powerful CNS stimulant?

Accepted Answer

A)  methamphetamine
B)  heroin
C)  marijuana
D)  alcohol
E)  All of the answer choices are powerful CNS stimulants.F) B) and D)
G) A) and B)

Question 17

Which lobe of the cerebrum is responsible for vision?

Accepted Answer

A)  frontal
B)  parietal
C)  temporal
D)  occipital
E)  insularF) A) and E)
G) A) and C)

Question 18

Which is NOT a correct association of brain structures and functions?

Accepted Answer

A)  midbrain-reflex centers for visual,auditory,and tactile responses
B)  cerebellum-coordinates smooth and coordinated motions
C)  cerebrum-higher thought processes,including learning,memory,and speech
D)  pons-regulates breathing rate
E)  thalamus-regulates heartbeat and blood pressureF) None of the above
G) B) and C)

Question 19

Which structure communicates with the prefrontal area of the brain and is involved in learning and memory?

Accepted Answer

A)  hippocampus
B)  amygdala
C)  pineal gland
D)  thalamus
E)  hypothalamusF) A) and D)
G) B) and E)

Question 20

Carpal tunnel syndrome results in damage to the median nerve,resulting in lack of control to the wrist and also numbness.This indicates that

Accepted Answer

A)  the nerve contained sensory neurons.
B)  the nerve contained motor neurons.
C)  the nerve contained both sensory and motor neurons.
D)  the damage was to a central body in a ganglion.
E)  the damage was to the spinal cord interneuron.F) None of the above
G) A) and B)

Exam 17: Nervous System

Which structures are associated with the limbic system?

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In the axon,the nerve impulses travel

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The cerebrum is the largest portion of the brain in humans.

Correct AnswerverifiedShow Answer

A nerve impulse is caused by

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Generally,nerve impulses do not move "backward" along a series of neurons.What is the reason for this?

Correct AnswerverifiedShow Answer

Spinal nerves contain

Correct AnswerverifiedShow Answer

Which is NOT a correct association of brain structures and functions?

Correct AnswerverifiedShow Answer

Which of the following drugs is a powerful CNS stimulant?

Correct AnswerverifiedShow Answer

Neurotransmitters are molecules that cross the synaptic cleft via

Correct AnswerverifiedShow Answer

Which brain structure serves as a bridge between the sensory association areas and the prefrontal area?

Correct AnswerverifiedShow Answer

Which of the following is NOT true about the cerebrum?

Correct AnswerverifiedShow Answer

Which of the following is not a way that a drug affects the brain?

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What are the two parts of the diencephalon?

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When the dorsal root of a spinal nerve is cut,

Correct AnswerverifiedShow Answer

Which part of the brain contains centers for the heartbeat and respiration?

Correct AnswerverifiedShow Answer

Carpal tunnel syndrome results in damage to the median nerve,resulting in lack of control to the wrist and also numbness.This indicates that

Correct AnswerverifiedShow Answer

In dissection,most nerve fibers appear gray to white because

Correct AnswerverifiedShow Answer

A nerve is

Correct AnswerverifiedShow Answer

Which structure communicates with the prefrontal area of the brain and is involved in learning and memory?

Correct AnswerverifiedShow Answer

Which lobe of the cerebrum is responsible for vision?

Correct AnswerverifiedShow Answer

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