Pancreozymin is also known as Cholecystokinin which results in contraction of the gall bladder and releases stored bile into the intestine. The gallbladder is a pear-shaped, hollow structure located under the liver and on the right side of the abdomen. Its primary function is to store and concentrate bile, a yellow-brown digestive enzyme produced by the liver.
Cholecystokinin is secreted by cells of the upper small intestine. It is secreted when hydrochloric acid, amino acids, or fatty acids enters to the duodenum.