name three hormones which are secreted along the alimentary canal
Answers
Answer:
Explanation:
Insulin
Insulin is secreted by the beta (B) cells of the pancreas in response to a rise in plasma glucose concentration and a fall in glucagon level. It stimulates the absorption of carbohydrates (glucose) into stores in muscle and adipose (fatty) tissue. Insulin is used in the treatment of diabetes mellitus.
Glucagon
Glucagon is produced by pancreatic alpha (A) cells in response to a drop in plasma glucose concentration; the effects of glucagon are opposite to those of insulin. Glucagon stimulates the breakdown of glycogen and the production of new glucose (gluconeogenesis) in the liver. It also decreases the production of gastric and pancreatic secretions. Glucagon is used in the treatment of conditions in which the level of sugar in the blood is lowered.
Somatostatin
Somatostatin is a peptide secreted by the delta (D) cells in response to eating, especially when fat enters the duodenum. It is an inhibitory modulator of the secretion of acid and pepsin and of the release of gastrin, insulin, and other intestinal hormones. It inhibits motility of the gallbladder and intestines and suppresses the secretion of lipase by the pancreas.
Intestinal glucagon
Secreted by the L cells in response to the presence of carbohydrate and triglycerides in the small intestine, intestinal glucagon (enteroglucagon) modulates intestinal motility and has a strong trophic influence on mucosal structures.