Human Digestive System

Enterogastrone is a hormone secreted by the duodenal mucosa, when fatty food is in the stomach or small intestine. It is also thought to be released, when sugars and proteins are in the intestine. Enterogastrone is transported by the bloodstream to the glands and muscles of the stomach, where it inhibits gastric movements and secretions, possibly by blocking the production or activity of gastrin, the hormone that initially causes these functions. Enterogastrone may slow down stomach emptying by reducing the amount of acid produced. High acid content causes the valve between the stomach and intestine to relax, allowing food passage.

• Cholecystokinin is secreted by cells of the upper small intestine. 
• Its secretion is stimulated by the introduction of hydrochloric acid, amino acids, or fatty acids into the stomach or duodenum. 
• Cholecystokinin stimulates the gallbladder to contract and release stored bile into the intestine. Hence, Cholecystokinin stimulates Gall's bladder.

• In the digestive system, VIP seems to induce smooth muscle relaxation (lower oesophagal sphincter, stomach, gallbladder), stimulate secretion of water into pancreatic juice and bile, and cause inhibition of gastric acid secretion and absorption from the intestinal lumen.
•  Its role in the intestine is to greatly stimulate secretion of water and electrolytes, as well as relaxation of enteric smooth muscle, dilating peripheral blood vessels, stimulating pancreatic bicarbonate secretion, and inhibiting gastrin-stimulated gastric acid secretion. 
•  It also has the function of stimulating pepsinogen secretion by chief cells. VIP seems to be an important neuropeptide during inflammatory bowel diseases.Hence, VIP hormone stimulates the secretion of Pepsinogen.

So, the correct answer is 'Pepsinogen'.

Enterogasterone is secreted by the epithelium which inhibits gastric secretion and morality.

Secretin is a digestive hormone secreted by the wall of the duodenum. Secretin helps regulate the pH of the duodenum by inhibiting the secretion of gastric acid from the parietal cells of the stomach and stimulates the acinar cells of the pancreas to secrete water and bicarbonate into the pancreatic ducts that drain into the duodenum. 

Enterocrinin is a hormone secreted by the duodenum mucosa and is stimulated by hydrogen ions which stimulates the intestinal glands to increase succus entericus juice. This breaks down sucrase, maltase, lactase, erepsin and nuclease for the body to use as energy.

cholecystokinin or CCK is a hormone released by stimulating endocrine cells by the fatty acids in the lumen of the duodenum. CCK or cholecystokinin role is to stimulate in smooth muscles of gallbladder and release of pancreatic secretions.

Secretin is a hormone that stimulates the pancreas to secrete a fluid rich in bicarbonate ions, which helps neutralize stomach acid in the duodenum.

Secretin is a peptide hormone produced by the S cells in the mucosa of the duodenum, which is part of the small intestine.

Gastrin is released by G cells in the stomach in response to mechanical distension and the presence of peptides, stimulating acid secretion.

Cholecystokinin (CCK) is the hormone that stimulates the pancreas to release digestive enzymes.

Gastrin is secreted by G cells, which are a type of enteroendocrine cell found in the gastric glands of the stomach.

• Secretin is a hormone secreted by the small intestine on being stimulated by low pH. It stimulates the pancreas to release water and bicarbonate ions. These are then drained into the pancreatic duct.

Cholecystokinin (CCK) is a peptide hormone of the gastrointestinal system responsible for stimulating the digestion of fat and protein.

Secretin is a classic gastrointestinal hormone that regulates the digestive environment.