1. There shall be no pancreatic juice secreted from pancreas. The pancreatic juice contains trypsin, chymotrypsin, amylase, lipase, carboxypeptidase enzymes. They digest protein, starch and fat. In the absence of these enzyme there would be digestion of protein, starch and fat will not takes place. 2. The � - cells and ? - cells of islets of Langerhans of pancreas secrete insulin and glucagon hormones respectively. The insulin causes glycogenesis (the process of conversion of glucose into glycogen in liver) and the glucagon causes glycogenolysis (the process of conversion of glycogen into glucose). Due to lack of insulin and glucagon these process are stopped. The level of glucose in blood will be increases. It may cause diabetes.