Compléter Digestion Fill inVersion en ligne digestion par kenneth thomas 1 protein Cholecystokinin Ptyalin Pepsinogen Meissner's Auerbach's milk protein decreases intrinsic motility enterokinase amylase Myentaric plexus : ( plexus ) In muscular layer of digestive tract for GI plexus : In the submucosa to promote secretions Mouth : Stomach : Chief cells 1 . in the presence of HCL becomes pepsin . 2 . Rennin clots Parietal Cells : Produce HCL and factor Gastrin : Helps with digestion Duendenum : Makes , a hormone responsible for contraction of the gall bladder when fat is present . Secretin : stimulates the flow of pancreatic juice and gastric motility . Pancreas : Lipase , , maltase - - the enzymes that break it down Trypsinogen : activated by in intestine Trypsin and chymotrypsin split