Physiology General afd9cc3c Which of the following is the best-known metabolic function of the lung A Inactivation of serotonin B Conversion of angiotensin–I to angiotensin–II C Inactivation of bradykinin D Metabolism of basic drugs by cytochrome P–450 system High-Yield Explanation Extracellular ACE on the surface endothelial cells in pulmonary circulation activates Angiotensin I to Angiotensin II.