Neurons

Card Set Information

Author:
kimkrak
ID:
310308
Filename:
Neurons
Updated:
2015-10-26 16:13:02
Tags:
psyc
Folders:
Psyc
Description:
test 3
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  1. nervous system
    • network of interconnected cells
    • recieves input from senses then processed info and produces reaction
  2. slectively permeable membrane
    only allows certain molecules in and out
  3. cells of NS have
    • nucleus ( DNA)
    • Mitochondria ( create energy)
    • slectively permeable membrane
  4. Neurons
    sned and recieve eletro-chemical signals ( neurotransmitters) to and from the brain

    • 100 billion neurons 
    • transmit at 200 mph
  5. can neurons regrow
    no unless they are in the hippocampus
  6. hippocampus
    • memory and emotion
    • damage pevents new memories from being made
  7. gilal cells
    • glue 
    • 90% of brains cells
    • supports and insulates neurons
  8. 5 dif types of gilal cells
    • 1 astocyte ( physical support)
    • 2 Microglia ( eats dead neurons)
    • 3 Oligodendroglia ( insulation ( myelin))
    • 4 Satellate ( support for neurons in PNS)
    • 5 * Schwan cells ( insulates neurons)
  9. axon
    carries nerve impulses away from body cell
  10. axon terminals
    • (terminal buttons) 
    • branched end of axon that has neurotransmitters
  11. cell body
    • soma = body
    • body of nucleus 
    • contains nucleus
  12. dendrites
    • recieves message
    • branching structire
  13. myelin sheath
    protects and speeds neural impulses of nerve fibers
  14. node of ranvier
    where action potential occurs
  15. nucleus
    contsins DNA (genetic material)
  16. Schwanns cell
    • produces myelin 
    • in myelin sheath
  17. neurotransmitters
    • chemicals in terminal buttons
    • allows neurons to communicate
  18. synapse
    space between terminal uttons of one and dendrties of another

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