Islets of Langerhans ⇒ increase secretion of hormone glucagon when concentration of blood glucose decreases below normal levels. ⇒ main target of glucagon is liver Glucagon increases blood glucose concentration by stimulating:
- conversion of glycogen into glucose
- conversion of fats and amino acids into glucose
Insulin and glucagon together regulate blood glucose concentration. This is an example of homeostatic mechanism
Blood Glucose Concentration.canvas
Important
- Glucagon STIMULATES LIVER CELLS to convert glycogen to glucose. does not convert it itself.