The inward flow of sodium ions increases the concentration of positively charged cations in the cell and causes depolarization, where the potential of the cell is higher than the cell's resting potential. The sodium channels close at the peak of the action potential, while potassium continues to leave the cell.
What you could do is sit her down and talk to her and also tell a trusted adult.<span>Tell her you're concerned for her, and offer support by suggesting specific ways to help her stop using drugs. </span>
