Homeostasis and hormones
Glucose is a sugar needed by cells for respiration. It is important that the concentration of glucose in the blood is maintained at a constant level. Insulin, a hormone secreted by the pancreas, controls blood sugar levels in the body.
Diabetes is a disorder in which the blood glucose levels remain too high. It can be treated by carefully maintaining a certain diet or injecting insulin. The extra insulin allows the glucose to be taken up by the liver and other tissues, so cells get the glucose they need and blood sugar levels stay normal.
|glucose level||effect on pancreas||effect on liver||effect on glucose level|
|too high||insulin secreted into the blood||liver converts glucose into glycogen||goes down|
|too low||insulin not secreted into the blood||liver does not convert glucose into glycogen||goes up|
Use the animation to make sure you understand how this works: