Question 1

Chemical synapses are characterized by

Accepted Answer

A)   the release of neurotransmitter by the presynaptic terminal.
B)   connexons that connect the pre- and postsynaptic cells.
C)   the presence of receptors for neurotransmitters on the presynaptic terminal.
D)   the absence of gap junctions.
E)   receptors located only on the presynaptic terminal.F) A) and B)
G) All of the above

Question 2

White matter is composed of

Accepted Answer

A)   ganglial sheaths.
B)   bundles of myelinated axons.
C)   collections of nerve cell bodies.
D)   bundles containing both myelinated axons and nerve cell bodies.
E)   collections of unmyelinated axons.F) B) and C)
G) A) and E)

Question 3

Which of the following is NOT true of reactive astrocytosis?

Accepted Answer

A)   injury site is blocked off
B)   scars limit regeneration
C)   causes the spread of inflammation
D)   reduces injury to surrounding tissueE) A) and B)
F) B) and C)

Question 4

A change in resting membrane potential confined to a small area is called a(n)

Accepted Answer

A)   local potential.
B)   action potential.
C)   summated potential.
D)   after potential.
E)   resting membrane potential.F) A) and D)
G) C) and E)

Question 5

Gaps or interruptions in the myelin sheath are called

Accepted Answer

A)   internodes.
B)   tight junctions.
C)   neurofilaments.
D)   nodes of Ranvier.
E)   gap junctions.F) C) and D)
G) A) and E)

Question 6

The nervous system has two subdivisions - the central nervous system and the ____________ nervous system.

Accepted Answer

The answer of The nervous system has two subdivisions -...

Question 7

Suppose both excitatory and inhibitory neurons synapse with a single postsynaptic neuron. What determines if an action potential is initiated in the postsynaptic neuron?

Accepted Answer

A)   the kind of neuron involved
B)   the size of the neuron involved
C)   whether the neuron is myelinated or non-myelinated
D)   the number of EPSPs in relation to the number of IPSPs
E)   This situation is not possible in humans.F) A) and E)
G) A) and C)

Question 8

A stimulus either causes an action potential or it doesn't. This is called

Accepted Answer

A)   an all-or-none response.
B)   a graded response.
C)   a latent period response.
D)   a relative refractory response.
E)   a local response.F) A) and B)
G) B) and E)

Question 9

Which of the following is responsible for problem-solving skills?

Accepted Answer

A)   central nervous system
B)   peripheral nervous system
C)   somatic nervous system
D)   autonomic nervous system
E)   None of these choices is correct.F) A) and E)
G) B) and C)

Question 10

-The figure is a process figure of the chemical synapse. What does "B" represent?

Accepted Answer

A)   postsynaptic membrane
B)   synaptic cleft
C)   synaptic vesicle
D)   voltage-gated calcium channel
E)   presynaptic terminalF) None of the above
G) A) and E)

Question 11

-The figure is a process figure of the chemical synapse. What does "C" represent?

Accepted Answer

A)   postsynaptic membrane
B)   synaptic cleft
C)   synaptic vesicle
D)   voltage-gated calcium channel
E)   presynaptic terminalF) B) and D)
G) C) and D)

Question 12

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

Accepted Answer

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

Question 13

Rapid removal or destruction of neurotransmitter in the synaptic cleft

Accepted Answer

A)   may affect the ability of the postsynaptic membrane to generate action potentials.
B)   generates local potentials in the presynaptic terminal.
C)   is necessary for synaptic transmission.
D)   may lead to action potentials.
E)   may stop exocytosis.F) B) and E)
G) A) and B)

Question 14

Dendrites

Accepted Answer

A)   are the input part of the neuron.
B)   conduct action potentials away from the cell body.
C)   are generally long and unbranched.
D)   form synapses with the microglia.
E)   contain the trigger zone.F) A) and C)
G) C) and D)

Question 15

What is the only neurotransmitter released at the neuromuscular junction?

Accepted Answer

A)   serotonin
B)   acetylcholine
C)   dopamine
D)   glutamateE) A) and B)
F) A) and C)

Question 16

Which of the following events will lead to depolarization?

Accepted Answer

A)   an increase in K+ ions in the extracellular fluid
B)   a decrease in K+ ions in the extracellular fluid
C)   an increase in the rate of diffusion of K+ ions from cells
D)   an increase in Na+ ions in the extracellular fluid
E)   None of these events would cause depolarization.F) B) and E)
G) A) and E)

Question 17

There are _____ pairs of cranial nerves and _____ pairs of spinal nerves.

Accepted Answer

A)   10; 30
B)   31; 12
C)   12; 31
D)   30; 10
E)   12; 32F) A) and B)
G) B) and E)

Question 18

Match the term with the correct definition.
-repolarization

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) C) and E)
G) B) and C)

Question 19

A decrease in the number of voltage-gated Ca2+ ion channels in the presynaptic terminal would

Accepted Answer

A)   enhance transmission across the synapse.
B)   reduce or inhibit transmission across the synapse.
C)   have no effect on transmission across the synapse.
D)   alter receptors on the postsynaptic membrane.
E)   increase exocytosis.F) B) and E)
G) D) and E)

Question 20

If the charge difference across the plasma membrane is decreased,

Accepted Answer

A)   the potential difference across the plasma membrane does not change.
B)   the membrane potential is more positive.
C)   the change is called hyperpolarization.
D)   negative proteins can leave the cell.
E)   the membrane potential is more negative.F) A) and D)
G) B) and E)

Exam 11: Functional Organization of Nervous Tissue

Rapid removal or destruction of neurotransmitter in the synaptic cleft

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White matter is composed of

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-The figure is a process figure of the chemical synapse. What does "C" represent?

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A change in resting membrane potential confined to a small area is called a(n)

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The nervous system has two subdivisions - the central nervous system and the ____________ nervous system.

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Dendrites

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Which of the following is NOT true of reactive astrocytosis?

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If the charge difference across the plasma membrane is decreased,

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What is the only neurotransmitter released at the neuromuscular junction?

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Match the term with the correct definition. -repolarization

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A decrease in the number of voltage-gated Ca2+ ion channels in the presynaptic terminal would

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-The figure is a process figure of the chemical synapse. What does "B" represent?

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Chemical synapses are characterized by

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Gaps or interruptions in the myelin sheath are called

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

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Which of the following events will lead to depolarization?

Correct AnswerverifiedShow Answer

There are _____ pairs of cranial nerves and _____ pairs of spinal nerves.

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A stimulus either causes an action potential or it doesn't. This is called

Correct AnswerverifiedShow Answer

Which of the following is responsible for problem-solving skills?

Correct AnswerverifiedShow Answer

Suppose both excitatory and inhibitory neurons synapse with a single postsynaptic neuron. What determines if an action potential is initiated in the postsynaptic neuron?

Correct AnswerverifiedShow Answer

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A decrease in the number of voltage-gated Ca²⁺ ion channels in the presynaptic terminal would

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There are _ pairs of cranial nerves and _ pairs of spinal nerves.

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