How does the hormone glucagon deliver a message to a target cell?

Question

How does the hormone glucagon deliver a message to a target cell?

Answer 1

Glucagon helps maintain the level of glucose in the blood by binding to glucagon receptors on hepatocytes, causing the liver to release glucose - stored in the form of glycogen - through a process known as glycogenolysis. As these stores become depleted, glucagon then encourages the liver to synthesize additional glucose by gluconeogenesis. This glucose is released into the bloodstream. Both of these mechanisms lead to glucose release by the liver, preventing the development of hypoglycemia. Glucagon also regulates the rate of glucose production through lipolysis.