After an action potential has occurred, there is more Na⁺ inside the cell than outside the cell (before any Na⁺-K⁺ pump activity has taken place).

Question

Quizplus · Accepted Answer

During an action potential, Na⁺ ions rush into the cell, but they do not accumulate to a level where there is more Na⁺ inside than outside; the concentration gradient remains higher outside the cell.

After an Action Potential Has Occurred, There Is More Na⁺