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Chapter 9 vocab

Shelby King

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Across
3.Fatty layers formed from certain neruoglia that surrounds axons, providing insulation
4.Masses of neuron cell bodies, usually outside the central nervous system
6.The difference in electrical charge between the inside and the outside of an undisturbed nerve cell membrane
7.A type of neuroglial cell that forms myelin
8.A bundle of axons in the peripheral nervous system
9.The part of the nervous system that integrates the information that it receives
11.carry nerve impulses from receptors or sense organs towards the central nervous system
13.carry nerve impulses away from the central nervous system to effectors
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 membranes threshold
16.A type of neuroligial cell that surrounds an axon ofa peripheral neuron, forming the neruilemmal sheath and myelin
18.the basic building blocks of the nervous system
19.Neuroligal cells tat line the ventricles of the brain
20.Chemicals that axons secrete on effectors or other neurons
24.specialized cells of the nervous system that produce myelin, communicate between cells, maintain the ionic environment, and nurture the differentiation of neruons
25.Portion of nerve cell that includes cytoplasmic mass and a nucleus and form which nerve fibers extend
26.The voluntary control of body movements
Down
1.A type of neuroglial cell that connects neurons to blood vessels
2.Consists of the nerves and ganglia outside of the brain and spinal cord
5.Acts as a control system functioning largely below the level of consciousness, and controls visceral functions
10.The gaps formed between the myelin sheaths generated by different cells
12.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
14.Specialized structures associated with the peripheral end of sensory neurons specific to detecting a particular sensation and triggering nerve impulses in response, which transmitted to the central nervous system.
17.Branched projections of a neuron that act to conduct the electrochemical stimulation received from other neural cells to the cell body
21.Muscles or glands that effect changes in the body
22.A long, slender projection of a nerve cell, or neuron, that conducts electrical impulses away from the neuron's cell body
23.ct as the first and main form of active immune defense in the central nervous system

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