Which of the following describes an “action potential”? A. The high concentration of Na + and Cl − outside the cell, and of K + inside the cell. B. The voltage change that moves along the cell membrane until it reaches the axon hillock. C. The movement of a neurotransmitter from the pre-synaptic membrane to the post-synaptic membrane. D. The movement of Na + across the cell membrane into the cell, followed by the movement of K + out of the cell.
Option D. Action potential:- The movement of Na + across the cell membrane into the cell, followed by the movement of K + out of the cell.
