What is an “action potential”? It is: A. when the resting potential changes from −70 mV to +30 mV and then back again. B. the name given to the difference in electrical charge between the inside and outside of the plasma membrane of a neurone. C. the name given to the stimulus that changes the resting potential from −70 to −50 mV. D. the voltage produced by a stimulus which causes a nerve impulse to be generated.
Option A. The action potential is the name given to the change in voltage of the inner of the cell from −70 to 30 and returned to −70 mV again. This voltage change propagates alongside the axon.
