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1) The very beginning
of the axon is called the
A) neurofibril.
B) initial segment.
C) axoplasm.
D) axon hillock.
E) Nissl body.
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D) axon hillock.
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2) The activity of the
nervous system is dependent upon
A) a proper
extracellular environment.
B) cellular
connections.
C) a proper
intracellular environment.
D) large amounts of
energy.
E) all of the above.
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A) a proper
extracellular environment.
B) cellular
connections.
C) a proper
intracellular environment.
D) large amounts of
energy.
E) all of the above.
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3) A neuron might be
temporarily unable to transmit an impulse to another if
A) its supply of
neurotransmitters is exhausted.
B) the neurons are of
different types.
C) the levels of
microglia are too low.
D) there are too many
astrocytes present.
E) either C or D is the
case.
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A) its supply of neurotransmitters is exhausted.
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4) Tracts in the spinal
cord form larger groups called
A) cranial nerves.
B) reverberating
neurons.
C) nuclei.
D) columns.
E) spinal nerves.
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D) columns.
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5) Movement of
nutrients, wastes, and organelles between the cell body and axon terminals is
called
A) osmosis.
B) axonal transport.
C) diffusion.
D) neurofibular
contraction.
E) axoplasmic
transport.
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E) axoplasmic transport.
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6) The structural
classification of a neuron is based upon
A) the size of the
dendrites.
B) the type of
chemical neurotransmitter it secretes.
C) the number of
axons.
D) the number of
processes that project from the cell body.
E) A and D
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D) the number of processes that project from the cell body.
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7) If a neuron loses
its centrioles,
A) it cannot grow as
quickly as neurons that retain their centrioles.
B) it loses its
normal ability to produce a myelin sheath.
C) it is rendered
incapable of dividing.
D) it is probably
located in the PNS.
E) all of the above
are true.
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C) it is rendered incapable of dividing.
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8) Areas of a
myelinated axon that are not covered by myelin are called
A) nodes.
B) internodes.
C) white matter.
D) gray matter.
E) all of the above
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A) nodes.
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9) Cardiac muscle,
smooth muscle, and glands are under the control of the
A) central nervous
system.
B) parasympathetic
division.
C) sympathetic
division.
D) somatic nervous
system.
E) B and C.
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B) parasympathetic
division.
C) sympathetic
division.
E) B and C.
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10) Nerve impulse
transmission between cells of the CNS without any delay can be attributed to
A) the presence of a
neuromuscular synapse between the cells.
B) the activity of
Schwann cells.
C) communicating
junctions that permit the passage of ions between the cells.
D) the number of
neurons in the chain.
E) A and C.
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C) communicating junctions that permit the passage of ions between the cells.
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11) Which of the
following neuroglia produce cerebrospinal fluid?
A) astrocytes
B) oligodendrocytes
C) satellite cells
D) ependyma
E) microglia
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D) ependyma
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12) Microglia are
(the)
A) largest
neuroglial cell.
B) smallest
neuroglial cell.
C) most numerous
neuroglial cell.
D) least numerous
neuroglial cell.
E) none of the above
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B) smallest neuroglial cell.
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13) A biopsy of
infected or injured tissue from the CNS will most likely show an elevated
number of
A) ependymal cells.
B) satellite cells.
C) oligodendrocytes.
D) interneurons.
E) microglia.
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E) microglia.
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14) A neuron pool is
A) a group of
neurons linked by communicating junctions.
B) a group of
interconnected neurons with specific functions.
C) the group of
neurons available to regenerate a damaged nerve.
D) a group of
identical nerve cells.
E) both A and B.
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B) a group of interconnected neurons with specific functions.
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15) When a neural
pathway splits to involve many areas of the nervous system, the type of
processing is known
as
A) serial.
B) reverberating.
C) diverging.
D) parallel.
E) converging.
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C) diverging.
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