And the thing about these ligangated ion channels is they're nonspecific. And what that means is they will allow the movement of not only the sodium ions down their electrochemical gradient, but also allow the movement of these potassium down their electrochemical gradient. And so we know that we have many more potassium molecules on the inside than on the outside. And so these potassium molecules sorry, these potassium mines will move spontaneously in this direction, while at the same time, because we have many more sodium on the outside than the inside, these sodium ions will move spontaneously into the cell. And as they move along their electrochemical gradient, they will cause an increase in the voltage difference across the cell membrane. So remember, for a neuron, the resting membrane potential is around negative 70 millivolts.