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The resting membrane potential of nerves is approximately -90 mV due to concentration gradients that favor potassium diffusion out of cells and sodium-potassium pump activity. An action potential is initiated when the membrane potential depolarizes to threshold. This allows voltage-gated sodium channels to open, causing rapid sodium influx and further depolarization to about +35 mV. Voltage-gated potassium channels then open, causing repolarization back to the normal resting potential. Action potentials all
- Author
- Tejesswin
- Language
- EN