Which is TRUE about neuronal membrane electrical and concentration gradients at the peak of the action potential?
A. The concentration gradient for Na+ is in a direction that would tend to move it out of the cell.
B. The concentration gradient for K+ greatly increases compared to at rest.
C. The concentration gradient for K+ is in a direction that would tend to move it into the cell.
D. The electrical gradient for Na+ is in a direction that would tend to move it into the cell.
E. The electrical gradient is in a direction that would tend to move K+ out of the cell.
Answer: E
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