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Functionally,99 percent of neurons are


A) sensory neurons.
B) motor neurons.
C) multipolar neurons.
D) bipolar neurons.
E) interneurons.

F) C) and E)
G) A) and D)

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Which is not a step in the process of Wallerian degeneration?


A) Neurolemmocytes form regeneration tube.
B) Proximal portion of severed axon seals off.
C) Effector is reinnervated.
D) Macrophages remove debris.
E) No exceptions; all of these are steps in the process.

F) B) and D)
G) A) and C)

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A primary tumor is one that originates in a primary embryonic germ layer such as mesoderm,endoderm,or ectoderm.

A) True
B) False

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Which glial cell helps to form the blood-brain barrier?


A) Astrocyte
B) Ependymal cell
C) Neurolemmocyte
D) Microglial cell
E) Oligodendrocyte

F) B) and D)
G) C) and D)

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The voluntary movement of skeletal muscle is controlled by the somatic nervous system.

A) True
B) False

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A slowly progressive disorder affecting muscle movement and balance,this condition is characterized by stiff posture,tremors,and reduced spontaneity of facial expressions.


A) Guillain-BarrΓ© syndrome
B) Parkinson disease
C) Multiple sclerosis
D) Amyotrophic lateral sclerosis
E) None of the choices is correct.

F) B) and E)
G) A) and B)

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The most abundant glial cell in the CNS is the


A) astrocyte.
B) ependymal cell.
C) neurolemmocyte.
D) microglial cell.
E) oligodendrocyte.

F) D) and E)
G) A) and C)

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Neural stem cells in the CNS


A) have no known function.
B) can only form glial cells.
C) can form new neurons throughout the CNS.
D) can form new neurons in only certain portions of the CNS such as the hippocampus.
E) can migrate to the PNS as needed.

F) C) and D)
G) B) and C)

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Which is not characteristic of neurons?


A) High mitotic rate
B) High metabolic rate
C) Require continuous supplies of glucose and oxygen
D) Extreme longevity
E) No exceptions; all of these are characteristic of neurons

F) A) and E)
G) None of the above

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Which glial cell provides structural support and organization to the CNS?


A) Astrocyte
B) Ependymal cell
C) Neurolemmocyte
D) Microglial cell
E) Oligodendrocyte

F) A) and C)
G) A) and B)

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A nerve


A) contains a single axon.
B) is found only in the CNS.
C) carries only sensory information.
D) carries information only toward the PNS.
E) is a cablelike bundle of parallel axons.

F) None of the above
G) B) and E)

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Which glial cell occupies the space left by dying neurons? Rev: 10_24_2015_QC_CS-30070


A) Astrocyte
B) Ependymal cell
C) Neurolemmocyte
D) Microglial cell
E) Oligodendrocyte

F) A) and D)
G) A) and C)

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Which is not a type of neuronal pool?


A) Converging
B) Triangular
C) Diverging
D) Parallel-after-discharge
E) Reverberating

F) A) and E)
G) C) and E)

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The function of neurofibril nodes is to


A) inhibit the transmission of a nerve impulse.
B) provide points of attachment for nerve threads.
C) produce a faster nerve impulse through salutatory conduction.
D) produce a slower impulse through continuous conduction.
E) protect the delicate axon sheath.

F) None of the above
G) A) and B)

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The afferent division of the nervous system is also known as the _____ division.


A) motor
B) cranial
C) ganglial
D) efferent
E) sensory

F) B) and D)
G) A) and D)

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Axons may form synaptic contacts with any unmyelinated portion of another neuron.

A) True
B) False

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