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7 Cards in this Set
- Front
- Back
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Neuron |
-axon: transmit signal away from cell body -axon collateral: side branch off axon. Vary in length and diameter (up to 1m in length) -larger diameter: larger velocity, more rapid conduction - myelination |
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Neuron classifications |
-multipolar -bipolar -unipolar |
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Functional classification |
-afferent: sensory neuron. Transmit nerve impulse to brain or spinal cord -efferent: motor neuron. Transmits nerve impulses away from brain to muscle/glands -interneurons: conduct impulses from afferent neuron to motor neurons (in the CNS) |
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Reflex arc |
- signal conduction route to and from CNS - 3 Neuron arc |
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Nerves |
- multilayered sheath: bundles of PNS nerve fibers held by several layer of connective tissue -endoneurium: surround Schwann cells of nerve fibers - fascicles: bundles of nerves. Bound by perineurium, acts like blood nerve barrier - complete nerve: several fascicles and blood vessels held together, is by Epineurium. -mixed nerves: nerves with mix of afferent and efferent fibers. |
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White and gray matter |
- white matter: bundles of myelinated fiber. -gray matter: unmyelinated fiber. Distinct gray in CNS are nuclei. Distinct gray in PNS are ganglia. |
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Repair of nerve fiber |
-limited capacity to repair themselves |
