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Neuronal repolarization

In chemical terms how the neuronal repolarization is achieved?

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Repolarization is defined as the return of membrane potential from the action potential (+35 mV) to resting potential (-70 mV).When membrane arrives its action potential, voltage-gated sodium channels closes and voltage-gated potassium channels open. So the sodium stops going into the cell and potassium starts in order to exit. Thus, the repolarization is because of the exiting of potassium cations from the cell. The repolarization results in the potential difference temporarily in order to increase under –70 mV, below the resting potential, a mechanism called as hyperpolarization.

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