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NERVOUS SYSTEM

Aaron MIler

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Across
2.The junction across which a nerve impulse passes from an axon terminal to a neuron
7.glia cells
12.chemicals which allow the transmission of signals
15.part of the nervous system that consists of the brain and spinal cord
19.The largest part of a cell
20.A short arm-like protuberance from a nerve cell (a neuron).
22.smallest of the glial cells
23.specialized part of the cell body (or soma)
25.cell in the central nervous system
26.supplying smooth muscle, cardiac muscle, & glands
27.supporting cells of the PNS
Down
1.the somatic nervous system and the autonomic nervous system
3.controls voluntary activities
4.controls involuntary actions
5.account for our ability to see, hear, taste, and smell, and to sense touch, pain, temperature, and body position
6.periodic gap in the insulating sheath (myelin) on the axon
8.increase the speed of impulses
9.cordlike bundles of fibers
10.A momentary change in electrical potential on the surface of a cell
11.a neuron conducting impulses inwards to the brain or spinal cord
13.most abundant cell in the central nervous system
14.cells which line the ventricles of the brain
16.potential to which a membrane must be depolarized to initiate an action potential
17.A muscle, gland, or organ capable of responding to a stimulus, especially a nerve impulse.
18.When a neuron is not sending a signal
21.commonly a mass of nerve cell bodies
24.basic building blocks of the nervous system

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