And so the actual potential will begin to move in this direction. But notice in this case, we also have a negative charge to the left of this increasing positive charge. So in the same way that this negative charge becomes more positive, when we have the influx of sodium, why doesn't this, the one right and back also become more positive? And so we also have an actual potential traveling this way. Why doesn't that actually take place? Well, it turns out that this region that is being rep polarized is actually experiencing an absolute refractory period.