And the channel basically allows the movement of these sodium ions. And notice in this case, we didn't have to consider the channel because we were looking at these non polar molecules and they can simply diffuse across that membrane. So let's take a look at this particular case. So let's suppose that the resting potential so the electrical potential difference between the two sides of the membrane in this particular case is negative 45 millivolts millivolts. And what that basically means is this quantity here is more negative than this quantity here, as we show in this particular case. Now, we know that on the outside, we're going to have a larger concentration of sodium ions than on the inside.