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Describe the function of two voltage-gated ion channels in the propagation of an action potential.

Describe the function of two voltage-gated ion channels in the propagation of an action potential.

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when depolarization results in increase in membrane voltage as a result action potential begins and crosses threshold value (-55mV) at this thresold voltage gated sodium channels open allowing entry of Na+ ions into cell. this leads to increase in voltage very rapidly upto +40m V . then sodium channels closed and potassium channels open to allow exit of K+ ions out of the cell down the concentration gradient. this leads to decrease in membrane potential to bring down to the resting state

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