Multiple choice biology chemical coordination and integration kidney hormones coordination in human beings- chemical control endocrine system in humans Chymase is a Rennin Activator of prorennin Activator of chymotrypsinogen Gastric juice Reveal answer Fill a bubble to check yourself C Correct answer Explanation Chymase is a chymotrypsin-like serine protease found in the mast cells and also present in basophil granulocytes. Chymase hydrolyzes chymotryptic substrates by activating chymotrypsinogen. So, the correct answer is 'Activator of chymotrypsinogen'.