And that makes the inside of the cell positive with respect to the outside. And that's exactly why we increase the value to about positive 30 millivolts. Now, notice it increases, but we don't actually get to the positive 60 millivolt value, which is what the sodium voltage is at equilibrium. And that's because as we begin to approach this value, some of these actually become inactivated. So remember, about a millisecond after we actually open these channels, they begin to close as a result of the occlusion, as a result of the blocking action of this chain. So, based on the ball and chain model, we know that this ball will basically move into that pore and that will block and inactivate the movement of these ions.