Digestion And Absorption

Gastrin hormone is secreted by gastrin cells in the pyloric region of stomach. It stimulates gastric glands to secrete and release the gastric juice, which contains HCl and proenzyme pepsinogen and prorennin.

Primary component of bones and also present in muscles and blood.

Bile salt activates lipase & also emulsifies the fat

Osteomalacia occurs due to deficiency of vitamin D in adults. It results in softening of bones. The most common symptoms are bone pain, backache and muscle weakness.

Cholecystokinin is a peptide hormone that is secreted by mucosal epithelial cells of the small intestine. Its secretion is stimulated by the hydrochloric acid or other acids present in the stomach or duodenum. It stimulates the secretion of bile from the gallbladder into the intestine. It also stimulates the acinar cells of the pancreas to release pancreatic juice.

Secretin stimulates the release of pancreatic juice, primarily bicarbonates.