Now, although the voltage gated potassium channels are slow to open, they too begin to open. But they open very slowly. But after about one millisecond of the opening of these sodium voltage gate on channels, they begin to close as a result of the inactivation of this ball. So this ball domain enters this section and it blocks that pore as shown in this particular diagram. And so now the sodium ion channels, the sodium ions can no longer move into the cell at the same moment in time. So in this region, we have the quickening of the opening process of these potassium voltage gated on channels, and so they begin to open up.