During the second half of an action potential, ____.
A)potassium ions are leaving the cell
B)the Na-K pump is off
C)sodium ions are moving into the cell
D)the cell is approaching threshold potential
E)the membrane potential is becoming more positive

Question

During the second half of an action potential, ____. ​
A)potassium ions are leaving the cell
B)the Na-K pump is off
C)sodium ions are moving into the cell
D)the cell is approaching threshold potential
E)the membrane potential is becoming more positive

Quizplus · Accepted Answer

During the second half of an action potential, the cell is repolarizing, which means potassium ions are leaving the cell. This results in the membrane potential becoming more negative again.

During the Second Half of an Action Potential, ____