The digestive enzymes are secreted from pancreas as inactive form which are called Zymogens or Proenzymes.
Explanation:
Pancreas secretes many Proteolytic enzymes such as Trypsinogen,Chymotrypsinogen.These enzymes undergo cleavage and to produce Trypsin and Chymotrypsin .
The cleavage process is mediated by by enzyne called enterokinase released from mucosal cells of small intestine leading to the formation of active Trypsin .The so formed active Trypsin then carry out both cleavage and activation of rest of the Trypsinogen and Chymotrypsinogen to generate active trypsin and chymotrypsin .
The pancreas is an organ of the digestive system and endocrine system of vertebrates. In humans, it is located in the abdomen behind the stomach and functions as a gland. The pancreas has both an endocrine and a digestive exocrine function. As an endocrine gland, it functions mostly to regulate blood sugar levels, secreting the hormones insulin, glucagon, somatostatin, and pancreatic polypeptide. As a part of the digestive system, it functions as an exocrine gland secreting pancreatic juice into the duodenum through the pancreatic duct. This juice contains bicarbonate, which neutralizes acid entering the duodenum from the stomach; and digestive enzymes, which break down carbohydrates, proteins, and fats in food entering the duodenum from the stomach. The word pancreas comes from the Greek πᾶν & κρέας.
