The cells that secrete glucagon are located in the:
adrenal medulla
anterior pituitary
adrenal cortex
pancreas

Glucagon is secreted by the alpha cells, which are located in the islets of Langerhans within the pancreas. This hormone plays a crucial role in regulating blood sugar levels, particularly by stimulating the liver to convert glycogen into glucose when blood sugar drops.

In the real-world, glucagon often comes into play in situations such as hypoglycemic emergencies, especially for individuals with diabetes. In these moments, glucagon injections can quickly raise blood glucose levels, providing a potentially life-saving effect. So, knowing where glucagon comes from is crucial for understanding its role in the body!