What is the main function of glucagon in the body?

The main function of glucagon in the body is to release glucose from cells into the bloodstream. Glucagon is a hormone produced by the alpha cells of the pancreas. Its primary role is to increase blood glucose levels when they fall below normal. It does this by signaling the liver to convert stored glycogen into glucose, which is then released into the bloodstream for use by other cells and tissues, particularly during fasting or between meals.

This mechanism is vital for maintaining energy levels and providing necessary fuel for metabolic processes, especially the brain and muscles, which rely heavily on glucose. The action of glucagon complements that of insulin, which works to lower blood sugar levels by facilitating the uptake and storage of glucose in cells. Understanding the role of glucagon provides insight into how the body maintains homeostasis in blood sugar regulation.