Describe and define the following terms and include their chemical makeup and function: Gastrin: Gastrin is a hormone that is produced by the stomach lining. It plays a crucial role in stimulating the secretion of gastric acid, which aids in the digestion of food. Gastric Inhibitory Peptide: Gastric Inhibitory Peptide, also known as glucose-dependent insulinotropic peptide (GIP), is a hormone that is released by the small intestine. Its main function is to stimulate the release of insulin from the pancreas in response to the presence of glucose in the bloodstream. Cholecystokinin: Cholecystokinin (CCK) is a hormone that is produced by the small intestine. It has multiple functions, including stimulating the release of digestive enzymes from the pancreas and causing the gallbladder to contract and release bile. Vasoactive Intestinal Peptide: Vasoactive Intestinal Peptide (VIP) is a hormone that is found in the gastrointestinal tract. It has various functions, including relaxing smooth muscles in the digestive system, stimulating the secretion of water and electrolytes, and promoting vasodilation. Motilin: Motilin is a hormone that is produced by the small intestine. Its primary function is to stimulate the contraction of smooth muscles in the gastrointestinal tract, promoting the movement of food through the digestive system. Somatostatin: Somatostatin is a hormone that is produced by various tissues in the body, including the stomach and pancreas. It acts as an inhibitor of other hormones, including gastrin, insulin, and glucagon. It also plays a role in regulating the secretion of digestive enzymes and inhibiting the release of growth hormone. Secretin: Secretin is a hormone that is produced by the small intestine. Its main function is to stimulate the secretion of bicarbonate from the pancreas, which helps to neutralize stomach acid in the small intestine.

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