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Blood vessels (capillaries) that selectively let certain substances enter brain tissue and keep others out.
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Type of glial (neuroglial) cell that transports water and salts from capillaries.
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Collection of spinal nerves below the end of the spinal cord.
A.
Neurotransmitter chemical released at the ends of nerve cells.
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Microscopic fiber that carries the nervous impulse along a nerve cell.
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Carries messages toward the brain and spinal cord from receptors.
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Lower portion of the brain that connects the cerebrum with the spinal cord.
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Part of a nerve cell that contains the nucleus.
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Middle layer of the meninges.
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Contains nerves that control involuntary body functions or muscles, glands, and internal organs.
A. Acetylcholine
B. afferent nerve
C. arachnoid membrane
D. astrocyte
E. autonomic nervous system
F. axon
G. blood-brain barrier
H. brainstem
I. cauda equina
J. cell body
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