If both Na+ and K+ channels are activated by depolarization, why do we see more Na+ flux during the rising phase of an action potential?
What will be an ideal response?
Although both channels are activated by depolarization, the Na+ channels open quickly allowing rapid Na+ entry into the cell. The peak of Na+ permeability coincides with the peak of the action potential, while the K+ channels open more slowly and don't reach their peak ion permeability until the falling phase of the action potential.
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