neuron parts

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Author:
Anonymous
ID:
16669
Filename:
neuron parts
Updated:
2010-04-28 17:22:42
Tags:
anatomy neuron parts
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Description:
chp 7: the nervous system
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  1. cell body
    metabolic center of the neuron, contains organelles (except centrioles)
  2. dendrites
    convey incoming messages toward the cell body
  3. axons
    conduct nerve impulses away from the cell body
  4. synaptic cleft
    tiny gaps between axon terminals, separates neurons
  5. myelin
    protects and insulates nerve fibers and increases the transmission rate of nerve impulses, axons outside the CNS are myelinated by Schwann Cells
  6. nodes of Ranvier
    gaps or indentations in the myelin sheath
  7. white matter
    consists of dense collections of myelinated fibers
  8. gray matter
    contains mostly unmyelinated fibers and cell bodies

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