So as soon as the voltage gated potassium channels open, the potassium ions will move down the electrochemical gradient to the outside of the cell, to this region here. Now, the membrane will once again become more permeable to our potassium than to sodium. And the sodium basically rushes out of the cell and this will make the inside more negative and the outside more positive. Now, once our voltage of the membrane decreases back to the threshold value of about negative 45 millivolts, some of the inactivated sodium channels will begin to recover. So they will begin to close, but now they're no longer inactivated. And this part will become important when we'll discuss the absolute refractory period and the relative refractory period.