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Ch. 9 Vocab. Mahlon Welch

Mahlon Welch

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Across
2.Neuroglial cells that line the ventricles of the brain.
5.Fatty layers formed from certain neuroglia that surround axons, providing insulation.
7.Specialized cells of the nervous system that produce myelin, communicate between cells, maintain the ionic environment, and nurture the differentiation of neurons.
13.A type of neuroglial cell that forms myelin.
16.Part of nervous system that controls the viscera.
19.A nerve that consists of motor neuron axons.
20.A nerve fiber. It conducts a nerve impulse away from the neuron cell body.
24.Masses of neuron cell bodies, usually outside the central nervous system.
25.A bundle of axons in the peripheral nervous system.
26.Specialized structures associated with the peripheral ends of sensory neurons specific to detecting a particular sensation and triggering nerve impulses in response, which are transmitted to the central nervous system.
27.The brain and spinal cord.
Down
1.Part of the nervous system outside the central nervous system.
3.A type of neuroglial cell that surrounds an axon of a peripheral neuron, forming the neurilemmal sheath and myelin.
4.A neuroglial cell that supports neurons and phagocytizes.
6.Motor pathways of the peripheral nervous system that lead to the skin and skeletal muscles.
8.Stimulation level that must be exceeded to elicit a nerve impulse or a muscle contraction.
9.A type of neuroglial cell that connects neurons to blood vessels.
10.A nerve composed of sensory nerve fibers.
11.Little spaces between Schwann cells .
12.The difference in electrical charge between the inside and the outside of an undisturbed nerve cell membrane.
14.Muscles or glands that effect changes in the body.
15.The sequence of electrical changes that occurs in a portion of a nerve cell membrane that is exposed to a stimulus that exceeds the membrane's threshold.
17.Chemicals that axons secrete on effectors (muscles or glands) or other neurons.
18.Portion of nerve cell that includes a cytoplasmic mass and a nucleus, and from which nerve fibers extend.
21.Process of a neuron that receives input from other neurons.
22.The fuctional connection between the axon of a neuron and the dendrite or cell body of another neuron or the membrane of another cell type.
23.Nerve cells.

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