An action potential is defined as the change in electrical potential associated with the passage of an impulse along the membrane of a muscle or nerve cell. There are action potentials for skeletal muscle, cardiac muscle, and pacemaker cells. There are many differences and similarities between each of these action potentials. One of the differences are the resting membrane potentials (RMP). The RMP of the skeletal muscle cell is -70mv, for cardiac muscle it is -90mv, and for the pacemaker action potential, it is -60mv. In the rising phase of action potential, also known as depolarization, skeletal and cardiac muscle have the same Na+ influx, while the pacemaker action potential also has a Ca+ influx along with Na+. In the falling phase of action
