Question 1

Clusters of neuron cell bodies in the PNS are called ________.

Accepted Answer

A)  neuromas
B)  axons
C)  ganglia
D)  nucleiE) A) and B)
F) None of the above

Question 2

A physiologist testing signal transduction rates in two different nerves notices that one fiber conducts signals much faster than the other. Which is the most likely difference between the two?

Accepted Answer

A)  The faster nerve fiber has more axons.
B)  The faster nerve fiber has more dendrites.
C)  The faster nerve fiber is myelinated and the slower one is not.
D)  The slower nerve fiber is myelinated and the faster one is not.E) All of the above
F) A) and C)

Question 3

What structure supports the axon from within?

Accepted Answer

A)  Dendrites.
B)  Nodes of Ranvier.
C)  Neurofibrils.
D)  Collaterals.E) None of the above
F) A) and C)

Question 4

Migraine results from

Accepted Answer

A)  release of calcitonin gene-related peptide from the trigeminal nerves at the base of the brain, in response to a spreading wave of excitation followed by lack of response from the cortex.
B)  not eating enough chocolate, which causes a spreading effect in the cortex.
C)  a neurotransmitter deficiency.
D)  release of an abnormal form of beta endorphin from the trigeminal nerves at the base of the brain, in response to cortical stimulation.E) B) and D)
F) C) and D)

Question 5

Each neuron in the CNS may receive input from

Accepted Answer

A)  only one synaptic knob.
B)  one synaptic knob at each end.
C)  about 10 dendrites.
D)  thousands of axons.E) A) and B)
F) A) and C)

Question 6

If a resting potential becomes more negative, the membrane is

Accepted Answer

A)  depolarized.
B)  hyperpolarized.
C)  repolarized.
D)  summated.E) A) and C)
F) A) and B)

Question 7

Opiate drugs derived from poppies relieve pain in humans because the human nervous system has

Accepted Answer

A)  neurotransmitters.
B)  receptors for endogenous opiates.
C)  myelin.
D)  sodium and potassium membrane channels.E) None of the above
F) All of the above

Question 8

Dendrites on unipolar neurons are parts of

Accepted Answer

A)  sensory neurons.
B)  motor neurons.
C)  interneurons.
D)  efferent neurons.E) C) and D)
F) None of the above

Question 9

A neuron receives a stimulation that causes Cl- channels to open, resulting in a hyperpolarization of the neuronal membrane. This situation is an example of a(n)

Accepted Answer

A)  facilitated potential.
B)  divergence.
C)  excitatory postsynaptic potential.
D)   inhibitory postsynaptic potential.E) A) and B)
F) A) and C)

Question 10

Neuroglia are specialized to react to environmental change, and neurons support neuroglia.

Accepted Answer

A) True 
 B)False

Question 11

The difference in electrical charge between the inside and outside of a polarized neuron cell membrane is called the ________ ________.

Accepted Answer

The answer of The difference in electrical charge between the...

Question 12

A mixed nerve includes different neuroglial cells.

Accepted Answer

A) True 
 B)False

Question 13

The cells in the nervous system that fill spaces and support neurons both physically and nutritionally are called ________.

Accepted Answer

The answer of The cells in the nervous system that...

Question 14

Sensory receptors are part of the CNS.

Accepted Answer

A) True 
 B)False

Question 15

In Guillain-Barre syndrome, the immune system attacks and degrades the myelin sheath of PNS axons. Predict the effect this will have on nerve impulse and motor function.

Accepted Answer

A)  Lost insulation from myelin will cause neurons of the PNS to be hyper-excitable and muscular spasms will result.
B)  Motor signals will not be sent from the brain down the efferent pathway because the brain cannot generate them.
C)  The brain will slowly degrade and various brain functions will be lost, including motor functions.
D)  Lost insulation from myelin will cause neurons of the PNS to lose saltatory conduction, resulting in poor muscle function.E) A) and C)
F) B) and D)

Question 16

In convergence, two or more incoming fibers contact a single neuron, whereas in divergence, impulses leaving a neuron pass into several output fibers.

Accepted Answer

A) True 
 B)False

Exam 10: Nervous System I: Basic Structure and Function

In Guillain-Barre syndrome, the immune system attacks and degrades the myelin sheath of PNS axons. Predict the effect this will have on nerve impulse and motor function.

Correct Answer
verified

Sensory receptors are part of the CNS.

Correct Answer
verified

If a resting potential becomes more negative, the membrane is

Correct Answer
verified

A physiologist testing signal transduction rates in two different nerves notices that one fiber conducts signals much faster than the other. Which is the most likely difference between the two?

Correct Answer
verified

Dendrites on unipolar neurons are parts of

Correct Answer
verified

Each neuron in the CNS may receive input from

Correct Answer
verified

What structure supports the axon from within?

Correct Answer
verified

A mixed nerve includes different neuroglial cells.

Correct Answer
verified

The difference in electrical charge between the inside and outside of a polarized neuron cell membrane is called the .

Correct Answer
verified

In convergence, two or more incoming fibers contact a single neuron, whereas in divergence, impulses leaving a neuron pass into several output fibers.

Correct Answer
verified

Opiate drugs derived from poppies relieve pain in humans because the human nervous system has

Correct Answer
verified

Migraine results from

Correct Answer
verified

A neuron receives a stimulation that causes Cl- channels to open, resulting in a hyperpolarization of the neuronal membrane. This situation is an example of a(n)

Correct Answer
verified

Neuroglia are specialized to react to environmental change, and neurons support neuroglia.

Correct Answer
verified

Clusters of neuron cell bodies in the PNS are called ________.

Correct Answer
verified

The cells in the nervous system that fill spaces and support neurons both physically and nutritionally are called ________.

Correct Answer
verified

Exam 10: Nervous System I: Basic Structure and Function

In Guillain-Barre syndrome, the immune system attacks and degrades the myelin sheath of PNS axons. Predict the effect this will have on nerve impulse and motor function.

Correct AnswerverifiedShow Answer

Sensory receptors are part of the CNS.

Correct AnswerverifiedShow Answer

If a resting potential becomes more negative, the membrane is

Correct AnswerverifiedShow Answer

A physiologist testing signal transduction rates in two different nerves notices that one fiber conducts signals much faster than the other. Which is the most likely difference between the two?

Correct AnswerverifiedShow Answer

Dendrites on unipolar neurons are parts of

Correct AnswerverifiedShow Answer

Each neuron in the CNS may receive input from

Correct AnswerverifiedShow Answer

What structure supports the axon from within?

Correct AnswerverifiedShow Answer

A mixed nerve includes different neuroglial cells.

Correct AnswerverifiedShow Answer

The difference in electrical charge between the inside and outside of a polarized neuron cell membrane is called the ________ ________.

Correct AnswerverifiedShow Answer

In convergence, two or more incoming fibers contact a single neuron, whereas in divergence, impulses leaving a neuron pass into several output fibers.

Correct AnswerverifiedShow Answer

Opiate drugs derived from poppies relieve pain in humans because the human nervous system has

Correct AnswerverifiedShow Answer

Migraine results from

Correct AnswerverifiedShow Answer

A neuron receives a stimulation that causes Cl- channels to open, resulting in a hyperpolarization of the neuronal membrane. This situation is an example of a(n)

Correct AnswerverifiedShow Answer

Neuroglia are specialized to react to environmental change, and neurons support neuroglia.

Correct AnswerverifiedShow Answer

Clusters of neuron cell bodies in the PNS are called ________.

Correct AnswerverifiedShow Answer

The cells in the nervous system that fill spaces and support neurons both physically and nutritionally are called ________.

Correct AnswerverifiedShow Answer

Correct Answer
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The difference in electrical charge between the inside and outside of a polarized neuron cell membrane is called the .

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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