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WHY AT THE TIME OF DEPOLARISATION K+ EFFLUX OCCURS. I know that at he time of depolarisation there should be influx of cations so that depolarisation that charge can go from -70mV TO +10mV ,,,, THEN WHY K+ GOES OUT, IF IT REMAINS INSIDE CELL THEN IT WILL BE EASIER TO ATTAIN DEPOLARISATION. EXPLAIN IT PLEASE

WHY AT THE TIME OF DEPOLARISATION K+ EFFLUX OCCURS.
I know that at he time of depolarisation there should be influx of cations so that depolarisation that charge can go from -70mV TO +10mV ,,,, THEN WHY K+ GOES OUT, IF IT REMAINS INSIDE CELL THEN IT WILL BE EASIER TO ATTAIN DEPOLARISATION. EXPLAIN IT PLEASE

Grade:12

1 Answers

Shilpi Mittal
askIITians Faculty 24 Points
8 years ago
Hello,
During depolarization sodium channels open that lead to influx of sodium ions that depolarizes fibre from -70mV to +10mV. However, as the impulse passes pottasium ion move outwards to restore the potential. And then Na+/K+ ATP pumps transfer sodium and pottasium ions to respective sites.

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