So let's suppose we are fasting for a long time. And because we are fasting, that means the glucose concentration inside our blood is low. So let's suppose we are experiencing high pole glycemia. So that basically means the concentration of glucose inside our blood plasma is low, and our cells in the body cannot obtain the proper amount of glucose. So what the body does is our pancreas uses the alpha cells to release glucagon. And then glucagon basically goes on and binds onto protein receptors on the membrane target cells in the liver, and it basically causes the process of glycogenolysis, the breakdown of glycogen into glucose.