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10 Cards in this Set
- Front
- Back
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nueron
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the cells that transmits the impulses
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cell body
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contains nucleus and cytoplasm
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dendrites
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carry the impulse from other neurons to the cell body
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axon
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a long fiber that carries the impulses away from the cell body
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myelin sheath
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surrounds the single axon, leaves gaps where the axon membrane is exposed... these are called nodes
as the impulse travels along the axon it can jump from node to node to make the process faster and smoother |
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resting potential
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the cell membrane lets more KA+ ions to leak than NA+ making it negatively charged
resting potential--the electrical charge across the cell membrane of a nueron in its resting state |
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action potential
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the inside of the cell membrane becomes more positive than the outside, reversing the resting potential
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threshold
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the minimum amount of stimulus that is required to activate a nueron
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synapse
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the location at which a nueroncan transfer an impulse to another cell
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nuerotransmitters
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chemicals used by a nueron to transmit an impulse across synapse to another cell
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