How blodd glucose levels are controlled and the effect of the hormones insulin and glucagon?
A lot of factors can change the Blood Glucose Concentration. – It increases after consuming food, especially if it’s high in carbohydrate. – It can decrease after exercise, because more glucose is used in respiration to release energy. The PANCREAS secretes Hormones to control Blood Glucose Levels. (Two hormones are Insulin and Glucagon – Secreted by a cluster of cells called the ”Islets of Langerhans”.) When there is a rise is blood Glucose conc…… – Glucose molecules bind to receptors and the Beta cells in Islet of Langerhans release Insulin into the blood. – Insulin molecules bind to receptors in the cell membranes of hepatocytes(liver) and other cells. -This increase permeability of the liver cell membrane to glucose, so more glucose is absorbed. – Inside the hepatocyes Insulin activate enzymes that catalyse the condensation of glucose molecules into glycogen, which is stored in the cytoplasm of liver cells and muscle cells – THIS IS CALLED GLYCOGENESIS. – Insulin also increas
