Final answer:
Gastrin is a hormone released from the G cells in the stomach. It stimulates the secretion of gastric acid by parietal cells to aid in the digestion of proteins.
Step-by-step explanation:
Gastrin is a hormone that is released from the G cells in the stomach. It stimulates the secretion of gastric acid by the parietal cells of the stomach mucosa, which helps in the digestion of proteins. Gastrin is mainly released in response to the presence of food in the stomach. It does not directly act on chief cells or stimulate the production of bicarbonate. Gastrin is a hormone released from the G cells in the stomach. It stimulates the secretion of gastric acid by parietal cells to aid in the digestion of proteins.