Physiology Action of renin: March 2013 A Erythropoiesis B Contols secretion of melatonin C Conves angiotensinogen to angiotensin I D Conves angiotensinogen Ito angiotensinogen II 💡 Explanation Action of renin: March 2013 ✓ Correct Answer: C. Conves angiotensinogen to angiotensin I