33. Which one of the foliowing statements is NOT true regarding the human digestive system? (A) Cholecystokinin (CCK) is a hormone that induces gallbladder contraction to increase release of stored bile. (B)Secretin is produced in the duodenum and suppresses the release of gastric acid from the stomach. (C) Bile is produced by the liver, stored in the gallbladder and released intermittently into the duodenum, when needed to digest proteins. (D) Gastrin stimulants secretion of gastric acid.