Insulin and the control of blood sugar level

If conditions in the body change too much this can be dangerous to our health (e.g. enzymes). Homeostasis is the regulation of internal conditions for optimum enzyme activity. Glucose travels in the blood plasma and is delivered to cells for aerobic respiration. The hormone insulin helps to keep human blood sugar level constant. The pancreas secretes insulin when blood sugar level is too high; it causes liver cells to convert glucose to glycogen.