What secretion does Gastric Releasing Peptide (GRP) increase?

Gastric Releasing Peptide (GRP) is a neuropeptide that plays a significant role in stimulating the secretion of gastrin from G cells in the stomach. Gastrin itself then promotes gastric acid secretion, which is vital for digestion. The action of GRP is primarily linked to the regulation of gastric functions, particularly in response to the presence of food in the stomach.

Therefore, when GRP is released, it enhances the release of gastrin, facilitating effective digestion and the preparation of the stomach for food processing. This makes gastrin secretion the correct answer, as GRP directly influences this process, showing its critical role in digestive physiology.