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The three basic functions of the nervous system are _____ function, _____ function, and _____ function.

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sensory, i...

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A main difference between neurons (nerve cells) and neuroglia (glia) is:


A) neuroglia are found only in the central nervous system.
B) mature neurons do not normally divide; neuroglia do.
C) neurons are more numerous than neuroglia.
D) neurons are generally smaller than neuroglia.

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The efferent (motor) portion of the autonomic nervous system consists of sympathetic and parasympathetic divisions.

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A Schwann cell (neurolemmocyte) contributes to the myelin sheath of _____ (one or several) axon(s).

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Which structure of the neuron is included in the neuromuscular junction?


A) the axon terminal
B) the axon hillock
C) the cell body (perikaryon)
D) the dendrites

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The following are all functions of astrocytes EXCEPT:


A) they help maintain the blood-brain barrier.
B) they synthesize neurotransmitters.
C) they participate in brain development.
D) they help maintain proper K+ balance.

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Select the best description of the Schwann cells (neurolemmocytes) :


A) form myelin sheaths in the central nervous system
B) help maintain the blood-brain barrier
C) form myelin sheaths in the peripheral nervous system
D) surround cell bodies in peripheral nervous system ganglia

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_____ (or sensory) impulses travel from the _____ to the _____.


A) Efferent, central nervous system, receptors
B) Efferent, receptors, central nervous system
C) Afferent, receptors, central nervous system
D) Afferent, central nervous system, receptors

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A significant difference between neurons and neuroglia is that mature neuroglia can divide whereas mature neurons generally cannot divide.

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Select the best description of dendrites:


A) stored in synaptic vesicles
B) accumulates as yellow-brown granules as the cell ages
C) usually short and branched
D) usually myelinated

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Select the best description of the oligodendrocytes:


A) form myelin sheaths in the central nervous system
B) help maintain the blood-brain barrier
C) form myelin sheaths in the peripheral nervous system
D) surround neurons in peripheral nervous system ganglia

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A neuron having one axon and one dendrite, such as those located in the retina or inner ear, are classified as _____ neurons.

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A nerve is a structure that may contain: 1) axons 2) blood vessels 3) neuron cell bodies 4) connective tissue 5) myelin 6) oligodendrocytes


A) 1, 2, 4, 5
B) 1, 3, 5, 6
C) 1, 4, 5 only
D) 2, 3, 4

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_____ (or motor) impulses travel from the _____ to the _____ (muscles or glands) .


A) Efferent, effectors, central nervous system
B) Efferent, central nervous system, effectors
C) Afferent, central nervous system, effectors
D) Afferent, effectors, central nervous system

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Dendrites are processes of a neuron that:


A) carry nerve impulses away from the neuron cell body.
B) are usually myelinated.
C) are usually longer than axons.
D) none of these choices

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Which of the following statements is FALSE regarding oligodendrocytes?


A) They are smaller than astrocytes.
B) They form myelin sheaths around central nervous system axons.
C) They line the fluid-filled ventricles of the brain.
D) They are not as numerous as astrocytes.

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State two conditions necessary for the regeneration of the processes of a neuron in the peripheral nervous system.

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1) The cell body mus...

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The cell type that represents most sensory neurons is the one labeled _____.


A) The cell type that represents most sensory neurons is the one labeled _____.  A)    B)   C)
B) The cell type that represents most sensory neurons is the one labeled _____.  A)    B)   C)
C) The cell type that represents most sensory neurons is the one labeled _____.  A)    B)   C)

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The peripheral nervous system includes:


A) cranial nerves and their branches.
B) spinal nerves and their branches.
C) ganglia
D) all of these choices

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Which structure of the neuron will contain the greatest number of neurotransmitter receptors?


A) the Nissl bodies
B) the axoplasm
C) the synaptic vesicles
D) the dendrites

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