Ah, the magic numbers! The resting potential sits around -70 mV, and the action potential zooms up to about +30 mV. At rest, sodium is mostly outside the cell and potassium is inside, but during the peak, sodium rushes in and then potassium rushes out to reset things. Honestly, I remember this only because my cousin is a nurse and she explained it like a voltage stabilizer for the heart. It makes me wish I'd followed my biology books as closely as my loan statements—knowing exactly how something is powered is a beautiful thing.
#haryana#athletics
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