I highly recommend these books, you will not be disappointed! OMG I LOVE THEM YOU WILL SERIOUSLY NEVER EVER REGRET READING THEM I HAVE BEEN READING THEM FOR 3 YEARS AND I KEEP ON HOPING SOMEONE WILL MAKE MORE OF THE BOXCAR CHILDREN BOOKS READ THEM!!!!!!!!!!
Cholecystokinin is secreted by I-cells in the small intestine and induces contraction of the gall bladder, relaxes the sphincter of Oddi, reduces of gastric acid secretion, increases bile acid production in the liver, delays gastric emptying, and induces digestive enzyme production in the pancreas.
1 Secretin - is in the duodenum and signals the secretion of sodium bicarbonate in the pancreas and it stimulates the bile secretion in the liver.  Cholecystokinin (CCK) - is in the duodenum and stimulates the release of digestive enzymes in the pancreas and the emptying of bile in the gall bladder.