Which hormone stimulates the release of gastric secretions during digestion?

The hormone that stimulates the release of gastric secretions during digestion is gastrin. Gastrin is produced by G cells in the stomach lining, particularly in response to the presence of food. It plays a crucial role in the digestive process by enhancing the secretion of gastric acid (hydrochloric acid) from parietal cells, which is essential for the digestion of proteins and the absorption of nutrients. In addition to stimulating acid secretion, gastrin also promotes the growth of the gastric mucosa and increases gastric motility, further aiding in the digestion of food.

Other hormones related to glucose metabolism, such as insulin and glucagon, regulate blood sugar levels but do not directly influence gastric secretions. Serotonin, while involved in various processes including mood regulation and gut motility, does not play a primary role in stimulating gastric secretions. Thus, gastrin is specifically linked to the stimulation of gastric juices, aligning perfectly with its function in the digestive system.