We need to eat to actually survive. Now, let's suppose we see a sandwich on a table, okay? And to get to that sandwich, what has to happen? Well, the skeleton muscle cells actually will allow us to move to that table and grab that sandwich. And it's the brain cells in our nervous system that essentially will tell those skeleton muscles to make our way to that table so that we can actually eat that sandwich and survive. So what I'm basically saying is, under certain circumstances, when the blood glucose level is low, the fact that in liver cells we have the glucokinase basically means the glucokinase will be much less likely to bind to that glucose than the hexokinases found in the brain cells and the muscle cells.