And so if we somehow create a pathway, these ions will want to move spontaneously. This way. So when we open up these channel, this channel what begins to happen? Well, let's suppose the channel is a specific ion channel, and it only allows the movement of these cat ions. It doesn't allow the movement of the Anion. So as we open it up, what happens is because of this concentration difference that exists between the two sides, these positively charged ions will begin to move spontaneously from this side to this side.