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The Nervous System Crossword

Chris Bearden

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Across
1.narrow gaps between Schwann cells
5.specialized structures associated with 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
7.a type of neuroglia cell that connects neurons to blood vessels
9.muscles or glands that effect changes in the body
12.a bundle of axons in the peripheral nervous system
15.masses of neuron cell bodies, usually outside the central nervous system
17.the brain and spinal cord
18.part of the nervous system outside of the central nervous system
22.the sequence of electrical changes that occurs in a portion of nerve cell membrane that is exposeed to a stimulus that exceeds the membrane's threshold
24.chemicals that axons secrete on effectors or other neurons
25.a neurological cell that supports neurons and phagocytizes
26.carry nerve impulses away from the central nervous system to effectors
27.a type of neuroglial cell that forms myelin
Down
2.part of the nervous system that controls the viscera
3.the functional connection between the axon of a neuron and the dendrite or cell ody of another neuron or the membrane of another cell type
4.the difference in electrical charge between the inside and the outside of an undisturbed cell membrane
6.stimulation level that must be exceeded to elicit a nerve impulse or muscle contraction
8.fatty material that forms a sheathlike covering around some axons
10.neurological cells that line with ventricles of the brain
11.process of a neuron that recieves input from other neurons
13.carry nerve impulses from receptors or sense organs towards the central nervous system.
14.motor pathways of the peripheral nervous system that lead to the skin and skeletal muscles
16.portion of nerve cell that includes a cytoplasmic mass and a nucleus, and from which nerve fibers extend
19.a type of neuroglia cell that surrounds an axon of a peripheral neuron, forming the neurilemmal sheath and myelin
20.a nerve fiber that conducts a nerve impulse away from the neuron body cell
21.nerve cells
23.specialized cells of the nervous system that produce myelin, communicate between cells, maintain the ionic environment, and nurtur the differentiation of neurons

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