BRAINCAKEInsulin
Insulin is produced by the beta cells of the islets of Langerhans in the pancreas. Beta cells detect a rise in the blood glucose concentration and secrete insulin into the blood. Te secretion of glucagon is inhibited. Almost all body cells except red blood cells have a glycoprotein insulin receptor on their cell surface membrane.
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Key terms in this lesson
- glucagon
- A hormone secreted by the alpha cells of the islets of Langerhans in response to low blood glucose concentration, which raises blood glucose by stimulating glycogenolysis and gluconeogenesis in the liver.
- islets of Langerhans
- Groups of endocrine cells within the pancreas containing alpha cells (which secrete glucagon) and beta cells (which secrete insulin).
- glycogenesis
- The conversion of glucose into glycogen for storage, which lowers blood glucose concentration.
More in Hormonal Communication
- The Adrenal Glands
- Adrenal Cortex
- Adrenal Medulla
- Pancreas
- Blood glucose concentration
- Glucagon
- Mechanism of Insulin Secretion
- Diabetes Mellitus
All 11 lessons in Hormonal Communication · All AQA A-level Biology topics