Gastrin is released by the action of diffuse neuroendocrine system (dnes) cells of the gastric gland.
So, the correct option is A.
This type of cell secretes hormones and amines (such as serotonin, secretin, gastrin, somatostatin, cholecystokinin, and glucagon) that control processes like gut motility, the release of stomach acid, and the secretion of intestinal enzymes. The duodenum and stomach both contain some D-cells, but the stomach is where gastrin is primarily produced. By way of enterochromaffin-like (ECL) cells, an enteroendocrine cell subtype, the stomach also produces somatostatin and histamine.
A peptide hormone called gastrin is primarily in charge of promoting gastric mucosal growth, gastric motility, and hydrochloric acid (HCl) secretion into the stomach. It exists in the duodenal and gastric antrum G cells. Gastrin stimulates acid secretion from gastric parietal cells and mucosal growth in the stomach's acid-secreting portion, which are its two main biological effects.
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