What is resting membrane potential of an axon, Biology

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Action potentials include changes in the membrane potential of an axon, as shown in the schematic below.

1640_biology.png

During the refractory period, sodium channels are inactivated and cannot be opened by depolarization. Like 'temporary' inactivation mechanism has evolved and ensures:

a. The sodium channel has ample time to revert to its 'resting state' conformation.

b.   The action potential travels unidirectionally.

c. Na+,K+-ATPase has sufficient time to pump Na+ out. 

d. the membrane potential stays below the resting potential of Na+

 

 


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