physiology quiz 4
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Created by:
mrholmesbiology on July 31, 2009
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10 terms
Terms | Definitions |
|---|---|
 polarity | a difference in charge in a cell |
| resting potential | homeostasis of the neuron |
| selectively permiable membrane | allows certain ions to go threw the cell |
| the NA+/K+ pump | 3 NA go out and 2 K come in |
| action potential | electrochemical impulse that is generated across the axon membrane |
| synapse | send neurotransmitters, needs a minumum amount of energy to start |
| depolarized ions | disrupt polarity of the cell by adding positive charge |
| axon hillock | thickest portion of the axon has the most volted gated sodium channels |
| threshold | the amount of stimulation requiered to fire a nueron is 15mv |
| repolarized ions | when the charge is too high it starts to turn negative |
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