Fats are uneducated: I don't think they get it. Here is the basic diagram, food intake works.... Food Intake --> Blood glucose level rises -->(pancreatic cells gets activated -->insulin is released into blood ---->body cells take up glucose---> blood glucose level decreases); thus reaching homeostasis again. So in this case, one can see what would happen if food intake is greater than the body cells use, the extras will be stored as fat.