Keyword Analysis & Research: action potential

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What are the steps of an action potential?

An action potential is generated in the following steps: depolarization, repolarization, hyperpolarization and a refactory period.

What does an action potential refer to as?

An action potential is part of the process that occurs during the firing of a neuron. During the action potential, part of the neural membrane opens to allow positively charged ions inside the cell and negatively charged ions out. This process causes a rapid increase in the positive charge of the nerve fiber.

What causes an action potential?

Action potentials are caused when different ions cross the neuron membrane. A stimulus first causes sodium channels to open. Because there are many more sodium ions on the outside, and the inside of the neuron is negative relative to the outside, sodium ions rush into the neuron.


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