So inside the cell, the glucose is transformed into glycogen, which is a polymer of glucose. And by this mechanism, our insulin basically controls and decreases the amount of glucose found inside the blood plasma because more glucose travels into the cell. And so the concentration of glucose inside the plasma, inside the blood decreases. Now, in this lecture, we're going to focus on two important abnormalities with respect to glucose and insulin. So we're going to discuss hypoglycemia as well as hyperglycemia. So let's begin by defining what hypoglycemia is.