Potential is restored when other channels open, allowing potassium ions to exit the axon.Sodium entry shifts the membrane potential toward a positive value.Ion channels open in the membrane, allowing sodium ions to enter the axon.Action potential occurs when the membrane potential rapidly shifts from -70 to +40 mV.The inside of the axon membrane is more negative that is the outside. Potassium ions are concentrated on the inside of the axon membrane. Resting Potential Sodium ions are concentrated on the outside of the axon membrane. Termination of transmitter effect (e.g.Storage and transport of NT within vesicles.
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