<prompt> Which of the following does not simulate enterogastric reflex?Products of protein digestion in the duodenumDuodenal distensionH ions bathing duodenal mucosaHormones  <response>: Regulation of gastric emptying by duodenum is through two mechanisms.- Hormonal mechanism- Inhibit gastric emptying and decrease gastric acid secretion.SecretinCCKVIPGIPPeptide YY - Enterogastric reflex- Inhibit gastric emptying through the intrinsic enteric neural plexus.Distension of the duodenumDuodenal hyperosmolarityPresence of acid, fats and products of protein digestion in the duodenum. 