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Nervous System

Deidre Miller

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Across
4.neuroglial cells that line the ventricles of the brain
7.part of nervous system that controls the viscera
8.fatty layers formed from certain neuroglia that surround axons, providing insulation
9.a neuroglial cell that supports neurons and phagocytizes
16.a nerve fiber. It conducts a nerve impulse away from the neuron cell body
21.the brain and spinal cord
23.a bundle of axons in the peripheral nervous system
24.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
25.muscles or glands that effect changes in the body
26.process of a neuron that receives input from other neurons
27.nerve cells
Down
1.part of the nervous system outside the central nervous system
2.neuron processes taht bring sensory information into the CNS
3.a level reached when the neurons are depolarized sufficiently, approximately -55 millivolts
5.carry impulses from the CNS to effectors (muscles or glands)
6.the functional connection between the axon of a neuron and the dendrite or cell body of another neuron or the membrane of another cell type
10.masses of neuron cell bodies, usually outside the central nervous system
11.the difference in electrical charge between the inside and the outside of an undisturbed nerve cell membrane
12.motor pathways of the peripheral nervous system that lead to the skin and skeletal muscles
13.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
14.chemicals that axons secrete on effectors (muscles or glands) or other neurons.
15.a type of neuroglial cell that surrounds an axon of a peripheral neuron, forming the neurilemmal sheath and myelin
17.narrow gaps between Schwann cells
18.pain resulting from inflammation of a nerve or group of nerves
19.a type of neuroglial cell that forms myelin
20.portion of nerve cell that includes a cytoplasmic mass and a nucleus, and from which nerve fibers extend.
22.a type of neurological cell that connects neutrons to blood vessels

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