Therefore, as the potassium ions into that cavity, into the inside, because of the presence of water, they do not lose that stabilizing salvation Cage. But notice what happens in this particular region. This region is very, very small. 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.