And that allows the movement of these potassium odds down their electrochemical gradient. And unlike in this case, the electrochemical gradient basically tells us that these potassium mons will move from the inside to the outside of the south. And this takes place here. So basically, what we see happening is the sodium ions can no longer flow into that cell, while at the same time, these potassium ions begin to flow out of the cell. And what that means is the positive charge inside the cell will begin to decrease. And so that means we'll see a drop in that voltage difference between the membrane.