<prompt> Which of the following is a Cholagogue?SecretinBicarbonateCCKBile salts  <response>: Substances that cause gallbladder contraction are called cholagogues. A well-known cholagogue is a cholecystokinin CCK.Fatty acids and amino acids products of digestion in the duodenum stimulate the release of CCK, which causes gallbladder contraction and opens the sphincter of Oddi. CCK also stimulates vagal nerve endings, bringing about the release of acetylcholine ACh, which also stimulates the gallbladder. Reference: Sircar Principles of Medical Physiology, 1st ed, Page: 444 