And this is the voltage gated sodium ion channel. Now, what happens when we go from this voltage difference to this voltage difference? These paddle domains essentially orient themselves upward. And as they move from this orientation to this orientation, that opens, that widens that pore on this side of the membrane. And as soon as that pore widens, that creates the open state. And the sodium ions can basically move down their electrochemical gradient from a high outside concentration to a low inside concentration.