In fact, it's so small and so restricted that the water molecules cannot actually fit into that region because it's only three angstroms wide. And what that means is if the potassium ion actually wants to make its way into this section and eventually makes its way out of that cell to the other side, it has to actually lose these water molecules. It has to lose that cage, it has to lose those stabilizing interactions between those water molecules. Now, we know to lose these interactions, we have to input a certain amount of energy. And that process requires energy, but we know this process does not require energy. So how is this actually fixed?