Question 1

A neuron with several dendrites and a single axon would be called a ____________ neuron.
multipolar

Accepted Answer

The answer of A neuron with several dendrites and a...

Question 2

Low levels of ___ can have dire consequences on the functioning of neurons because of its role in membrane repolarization.

Accepted Answer

A)   sodium ions
B)   potassium ions
C)   chloride ions
D)   hydrogen ionsE) All of the above
F) None of the above

Question 3

Protein synthesis in neurons occurs in

Accepted Answer

A)   axons.
B)   dendrites.
C)   cell bodies or soma.
D)   terminal boutons.
E)   node of Ranvier.F) B) and C)
G) A) and D)

Question 4

Which of the following statements regarding neuroglia is false?

Accepted Answer

A)   Neuroglia serve as the major supporting tissue in the CNS.
B)   Neuroglia form part of the blood-brain barrier.
C)   Neuroglia produce action potentials for skeletal muscles.
D)   Neuroglia form myelin sheaths around some axons.
E)   Neuroglia produce cerebrospinal fluid.F) All of the above
G) A) and C)

Question 5

When two or more presynaptic neurons synapse with a single postsynaptic neuron in the CNS, a(n)  _______ pathway is formed.

Accepted Answer

A)   convergent
B)   divergent
C)   reverberating
D)   somatic
E)   sensoryF) A) and C)
G) D) and E)

Question 6

A neuromodulator

Accepted Answer

A)   acts as a neurotransmitter.
B)   inactivates neurotransmitters.
C)   is a receptor site for a neurotransmitter.
D)   has no influence on the amount of neurotransmitter released.
E)   is a substance released from neurons that influences the sensitivity of neurons to neurotransmitters.F) D) and E)
G) B) and E)

Question 7

Match the neuroglial cell with its function.
-ependymal cells

Accepted Answer

A)  influence function of blood-brain barrier
B)  macrophages in CNS
C)  produce cerebrospinal fluid
D)  form myelin sheath around axons in CNS
E)  form myelin sheath around part of the axon in the PNSF) A) and D)
G) B) and E)

Question 8

The figure illustrates the Action Potential. What does "A" represent?

Accepted Answer

A)   repolarization
B)   depolarization
C)   local potential
D)   threshold
E)   afterpotentialF) A) and C)
G) A) and E)

Question 9

Nissl bodies are

Accepted Answer

A)   part of a dendrite.
B)   also called gemmules.
C)   lipid droplets.
D)   areas of rough endoplasmic reticulum.
E)   part of the Golgi apparatus.F) None of the above
G) B) and E)

Question 10

The motor neurons responsible for making a fist are

Accepted Answer

A)   tripolar.
B)   bipolar.
C)   multipolar.
D)   pseudo-unipolar.
E)   None of these choices are correct.F) A) and B)
G) B) and E)

Question 11

Match the term with the correct definition.
-depolarization

Accepted Answer

A)  a small change in the resting membrane potential confined to a small area
B)  a charge difference across the plasma membrane when the cell is in an unstimulated state
C)  a larger change in resting membrane potential that spreads over entire surface of a cell
D)  membrane becomes more positive when sodium ions diffuse into cell
E)  return to the resting membrane potentialF) A) and B)
G) A) and E)

Question 12

Which of the following is mismatched?

Accepted Answer

A)   central nervous system - brain
B)   autonomic nervous system - sympathetic and parasympathetic divisions
C)   peripheral nervous system - spinal nerves
D)   somatic nervous system - sensory division of PNS
E)   peripheral nervous system - sensory and motor divisionsF) A) and D)
G) A) and C)

Question 13

Protein synthesis in neurons occurs in

Accepted Answer

A)   terminal boutons.
B)   axons.
C)   dendrites.
D)   cell bodies or soma.
E)   node of Ranvier.F) B) and C)
G) A) and E)

Question 14

Neurotransmitters

Accepted Answer

A)   stimulate presynaptic terminals.
B)   remain in the synaptic cleft for long periods of time.
C)   bind irreversibly to the receptor molecules of the postsynaptic membrane.
D)   cause the production of action potentials in the postsynaptic membrane.
E)   do not affect membrane channels in the postsynaptic membrane.F) B) and E)
G) A) and C)

Question 15

Clusters of gray matter deep within the brain are called

Accepted Answer

A)   cortices.
B)   nerves.
C)   ganglia.
D)   nuclei.E) All of the above
F) A) and B)

Question 16

A local anesthetic such as Novocaine decreases membrane permeability to Na+ ions. The use of this anesthetic will

Accepted Answer

A)   block sensory input into the CNS.
B)   enhance the development of EPSPs.
C)   cause RMP to move closer to threshold.
D)   cause Cl- ions to enter cells instead of Na+ ions.
E)   depolarize the cell.F) C) and D)
G) B) and E)

Question 17

A neuron is receiving a stimulus which gets stronger and stronger. The result is

Accepted Answer

A)   amplitude of the action potential increases.
B)   duration of the action potential increases.
C)   frequency of occurrence of action potentials increases.
D)   resonance of action potentials increases.
E)   height of the action potentials increases.F) A) and E)
G) A) and B)

Question 18

The figure illustrates the Action Potential. What does "E" represent?

Accepted Answer

A)   repolarization
B)   depolarization
C)   local potential
D)   threshold
E)   afterpotentialF) A) and D)
G) C) and E)

Question 19

The central nervous system

Accepted Answer

A)   is the site for processing information.
B)   initiates visual and auditory stimuli.
C)   consists of 43 pairs of nerves.
D)   is totally involuntary.
E)   does not interact with the peripheral nervous system.F) A) and E)
G) A) and B)

Question 20

Which of the following statements accurately describe events that occur as a result of a local potential reaching threshold?

Accepted Answer

A)   Activation gates of Na+ ion channels begin to close.
B)   Inactivation gates of Na+ ion channels begin to open.
C)   A positive feedback cycle develops in which depolarization causes activation gates of Na+ ion channels to open.
D)   K+ ion channels begin to close.
E)   Inactivation gates of Na+ ion channels begin to open and a positive feedback cycle develops in which depolarization causes activation gates of Na+ ion channels to open.F) A) and E)
G) B) and C)

Exam 11: Functional Organization of Nervous Tissue

A neuromodulator

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Match the term with the correct definition. -depolarization

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Neurotransmitters

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The figure illustrates the Action Potential. What does "A" represent?

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The figure illustrates the Action Potential. What does "E" represent?

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Which of the following is mismatched?

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Which of the following statements regarding neuroglia is false?

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Which of the following statements accurately describe events that occur as a result of a local potential reaching threshold?

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The motor neurons responsible for making a fist are

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When two or more presynaptic neurons synapse with a single postsynaptic neuron in the CNS, a(n) _______ pathway is formed.

Correct AnswerverifiedShow Answer

Low levels of ___ can have dire consequences on the functioning of neurons because of its role in membrane repolarization.

Correct AnswerverifiedShow Answer

Protein synthesis in neurons occurs in

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Protein synthesis in neurons occurs in

Correct AnswerverifiedShow Answer

A neuron is receiving a stimulus which gets stronger and stronger. The result is

Correct AnswerverifiedShow Answer

A local anesthetic such as Novocaine decreases membrane permeability to Na+ ions. The use of this anesthetic will

Correct AnswerverifiedShow Answer

A neuron with several dendrites and a single axon would be called a ____________ neuron. multipolar

Correct AnswerverifiedShow Answer

Match the neuroglial cell with its function. -ependymal cells

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The central nervous system

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Clusters of gray matter deep within the brain are called

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Nissl bodies are

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