What is action potential repolarization?

Action potential repolarization is one of the phases that occur when a nerve pulse is transmitted. Nerve pulses are electrochemical messages that are sent along the entire length of the neuron or nerve cells, from dendrites to terminal buds axon. Reports are said to transmit electrochemically because the chemicals in the body cause the electrical signal to move through a neuron. Stages that are subject to, resting, depolarization of action potential and repolarization of action potential. In particular, specific ions are sodium, potassium, chloride and calcium. Sodium and potassium have a positive charge +1, while calcium has a positive charge +2. Chloride ions are negatively charged (-1) .l and which are kept out of it. As a result, the interior of the neuron has a negative charge compared to the area that surrounds it. Ion channels and pumps inside the membrane against the effect of ion diffusion to maintain a resting potential of approximately -70 Milivolt (MV).

In order to send a nerve pulse, there must be action potential in the neuron. Neuron depolarization is essential for sending action potential along the nerve cell. This means that through the cell membrane of the neuron, ions are replaced, which is caused by some type of stimulation. When the neuron is stimulated, the sodium channels inside the membrane open, allowing the sodium ions to plunge into the nerve cell. As more sodium ions enter the neuron, the inside of the cell becomes increasingly positive compared to its outside.

threshold at least -55 mV must be achieved to send action potential. If the threshold is not reached, then the action potential or nerve pulse is not sent. When the threshold is reached, most sodium channels opened, so the charge in the cell reaches +30 mV. This tip is an action potential that is an electrical impulse that travels along the length of the nerve cell. The action potential stimulates another part of the neuron while the previous partt begins to repolarize action potential.

During the repolarization of the action potential, the relative charge of the neuron returns to its resting state. Once the +30 MV is reached, potassium channels begin to open and sodium channels close. When the potassium channels open, the potassium emerges from the cell to try to balance the hubs on both sides of the membrane. The potassium channels remain open until the resting potential of -70 mV is achieved.