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| chromatophilic substance; stains darkly with basic dyes |
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| bundles of intermediate filaments; important in maintaining cell shape and integrity; seen throughout cell body |
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| extend from the cell body of all neurons |
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| branching neuron process that serves as a receptive, input, or region; transmits the nerve impulse toward the cell body |
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| neuron process that carries impulses away from the nerve cell body; efferent process; the conducting portion of a nerve cell |
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| cone-shaped area of the cell body |
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| fatty insulating sheath that surrounds all but the smallest nerve fibers |
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| conduct nerve impulses rapidly |
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| axons lacking a myelin sheath and therefore conducting impulses quite slowly |
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| portion of Schwann cell that includes the exposed part of its plasma membrane |
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| gaps in the sheath of Schwann cells |
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| white substance of the central nervous system; myelinated nerve fibers |
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| gray area of the central nervous system; contains cell bodies and unmyelinated fibers of neurons |
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| neurons with three or more processes; most common neuron type in the central nervous system |
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| neuron with axon and dendrite that extend from opposite sides of the cell body |
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| neuron in which embryological fusion of the two processes leaves only one process extending from the cell body |
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| sensory (afferent) neurons |
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| transmit impulses from sensory receptors in the skin of internal organs toward or into the central nervous system |
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| carry impulses aaway from the central nervous system to the effector organs (muscles & glands) of the body periphery |
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| interneuron (association) neurons |
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| lie between motor and sensory neurons in neural pathways and shuttle signals through the central nervous system pathways where integration occurs |
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