action potential

Card Set Information

Author:
kimkrak
ID:
310529
Filename:
action potential
Updated:
2015-10-28 18:18:50
Tags:
psyc
Folders:
Psyc
Description:
test 3
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The flashcards below were created by user kimkrak on FreezingBlue Flashcards. What would you like to do?


  1. how to neurons send messages
    neurotransmitters
  2. important ions in nervous system
    • sodium
    • calcium
    • potassium
    • chloride
  3. on outside of neuron
    sodium & calcium
  4. when is he neuron polar
    • when neurons at rest
    • ( the inside is more negative outside)
  5. electrochemical potential
    created by polarity
  6. which have difficulty passing through membrane
    • calcium -
    • sodium +
  7. which can easily cross membrane
    k
  8. resting membrane potential of neuron
    -70 milivolts
  9. when does an action potential occur
    when neurons send info down an axon away from cell body
  10. when will depolarization fire an action potential
    -55 mV known as threshold
  11. when action potential reaches threshold
    there always an action potential and the size will always be the same
  12. what is depolarization
    sodium channels open and neuron becomes more positive
  13. when does repolarization occur
    -70 mV
  14. what happens if action potential goes past -70
    hyperpolarization
  15. all or none principle
    if neuron doesn'tĀ atleastĀ reach -55 mV there will be no action potential

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