What causes potassium ions to leave the axon just after the peak of the action potential?
A) A continuing concentration gradient and the opening of the potassium gates
B) An increase in the concentration gradient across the membrane
C) An increased tendency of the sodium-potassium pump to push potassium out
D) Binding of potassium ions to proteins that leave at this time

Question

Quizplus · Accepted Answer

After the peak of the action potential, the concentration gradient for potassium ions is still higher inside the neuron than outside, and the potassium gates in the membrane are still open. This creates a driving force for potassium ions to leave the axon and return to equilibrium.

What Causes Potassium Ions to Leave the Axon Just After