Glucagon's primary action is to increase glucose production in the liver to maintain adequate plasma glucose concentrations.
Understanding Glucagon's Role
Glucagon is a peptide hormone secreted by the alpha cells of the pancreatic islets of Langerhans. Its secretion is primarily stimulated by hypoglycemia (low blood sugar).
Key Action of Glucagon
The most well-known action of glucagon, according to the reference, is to stimulate glucose production in the liver, thereby maintaining adequate plasma glucose concentrations. This counteracts the effects of insulin, which lowers blood sugar levels.
| Action | Description |
|---|---|
| Glucose Production | Glucagon stimulates the liver to break down glycogen (stored glucose) into glucose and release it into the bloodstream. |
| Maintaining Glucose Levels | By promoting glucose production, glucagon helps prevent hypoglycemia and ensures the body has a constant supply of energy. |
| Trigger for Secretion | Hypoglycemia is the most potent stimulus for glucagon secretion. This ensures that glucagon is released when blood sugar levels are too low. |
