The hormone which stimulates the stomach for the production of digestive juice is gastrin. Gastrin is a peptide hormone that is produced by the G cells in the stomach and duodenum. It stimulates the secretion of gastric acid, pepsinogen, and mucus by the stomach. Gastrin also stimulates the growth of the stomach and small intestine.
Trypsin is a digestive enzyme that is produced by the pancreas. It is a protease that breaks down proteins into smaller peptides.
Secretin is a hormone that is produced by the S cells in the duodenum. It stimulates the secretion of pancreatic juice and bile by the pancreas and liver.
Pepsin is a digestive enzyme that is produced by the chief cells in the stomach. It is a protease that breaks down proteins into smaller peptides.
In conclusion, the hormone which stimulates the stomach for the production of digestive juice is gastrin.