MICROANATOMY

Detailed explanation-1: -Glucagon is a peptide hormone secreted from the alpha cells of the pancreatic islets of Langerhans. Hypoglycemia is physiologically the most potent secretory stimulus and the best known action of glucagon is to stimulate glucose production in the liver and thereby to maintain adequate plasma glucose concentrations.

Detailed explanation-2: -It is secreted from the -cells of islets of Langerhans in pancreas. It increases blood sugar level by acting on hepatocytes and stimulates: Breakdown of glycogen (Glycogenolysis i.e. conversion of glycogen into glucose)) Synthesis of glucose from proteins and fats (Gluconeogenesis)