1.

During generation of an action potential, depolarisation is due to (a) K+ efflux (b) Na+ efflux (c) Na+ influx (d) K+ influx

Answer»

Correct option is (c) Na+ influx

As the membrane potential is increased, sodium ions channels open, allowing the influx of Na+ ions into the cell. The inward flow of sodium ions increases the concentration of positively charged cations in the cell and causes depolarisation, where the potential of the cell is higher than the cell’s resting potential.



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