A&P FINAL 3

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Author:
rwischnewski
ID:
290880
Filename:
A&P FINAL 3
Updated:
2014-12-07 10:39:43
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A&P FINAL
Description:
FINAL
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  1. dendrites?
    projection that receives signals
  2. cell body?
    area that contains nucleus and ribosomes
  3. axon?
    projection that sends nerve signals
  4. trigger zone?
    sums local potentials, initiates action potential
  5. synaptic knob?
    stores and releases neurotransmitters
  6. oligodendrocytes?
    makes myelin for the brain
  7. ependymal cells?
    makes cerebrospinal fluid
  8. microglia?
    provides immune protection
  9. astrocytes?
    • forms blood brain barrier
    • provides framework for the brainĀ 
    • absorbs used neurotransmitters
  10. where is myelin found?
    axons
  11. what is the function of the myelin?
    provides membrane for neurotransmitter vesicles
  12. depolarization is due to _______.
    entry of sodium
  13. repolarization is due to _______.
    entry of sodium
  14. a single neurotransmitter may cause contraction in one set of smooth muscle and relaxation in another. what determines which action will occur?
    the receptor on the smooth muscle
  15. inhibitory local potentials differ from excitatory local potentials in that _______.
    inhibitory channels allow negative ions into the cell
  16. what does plasticity mean in the nervous system?
    synapses can increase or decrease

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