Final answer:
Trypsinogen, chymotrypsin, and other protease enzymes are produced by the pancreas. They are secreted in their inactive forms to prevent damage to the pancreas, with trypsinogen being activated to trypsin in the duodenum, which then activates other enzymes.
Step-by-step explanation:
The proteases trypsinogen, chymotrypsin, and other protein-digesting enzymes are produced by the pancreas. These enzymes are secreted in their inactive forms to prevent the digestion of the pancreas itself, a condition known as pancreatitis. Trypsinogen is converted to its active form, trypsin, in the duodenum by a brush border enzyme called enteropeptidase. Trypsin then activates other enzymes such as procarboxypeptidase and chymotrypsinogen to their active forms, carboxypeptidase and chymotrypsin.
The pancreas also produces pancreatic lipase for fat digestion, as well as nucleases like deoxyribonuclease and ribonuclease that break down nucleic acids. Meanwhile, the liver produces bile that is stored in the gallbladder and later released into the duodenum to aid in fat digestion.