Directions: Excitable tissues in our body (nerve and muscle) have the capacity to generate and propagate electrical currents. These electrical currents are called an action potential. In the nervous system we also call this event a nerve impulse. An action potential is described as discrete events that occur in succession causing a change in polarity of the nerve membrane. These events are the resting membrane potential, depolarization, repolarization, and hyperpolarization. In this essay you are to explain the ion movements and resulting changes in membrane potential that occurs during each of these events.
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