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smithcherry smithcherry
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11 years ago
If the sodium has already left the neuron and the action potential has been passed, why would potassium leave? wouldn't the cell want to retain potassium so that it could return to a resting potential?
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wrote...
11 years ago
I'm thinking that you've got something mixed up. Sodium doesn't leave the neuron, it enters. Sodium entering the neuron is the reason for the depolarization. The flow of potassium out of the neuron then causes repolarization, regenerating the resting potential of the cell, as you mentioned.

If this does not answer your question, then please clarify.
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