Action potential by Colton and Anna. An action potential is a short lasting event in which the electrical membrane potential of a cell rapidly rises and falls following consistent trajectory. No matter how far the potential travels and never lose their strength. During the resting state both the sodium and potassium gates remain closed. The cells remain positive on the outside and negative inside. An activation gate always remain open. In order for action potential the millivolt has to reach negative 15 millivolt if not nothing happens. During the depolarization state the sodium gates are open while the potassium gates are closed. During the repolarization phase the sodium and activation gates are closed while the potassium gates remain open. The cells remain positive on the outside and negative on the inside. During hyperpolarization the potassium gates remain open while the sodium gates stay closed. When hyperpolarization occurs the cells become insensitive to stimulus. The sodium potassium pump happens once hyperpolarization occurs. Everything back to the resting state is stored in the sodium potassium pump. During the resting state the cells remain positive outside and negative inside. And during the depolarization phase the cells remain positive inside and negative outside. During the repolarization phase the cells remain positive outside and negative inside. During hyperpolarization the more positive and negative cells are gained.