Physiology General physiology d3eef45f Paial pressure of O2 at atmospheric pressure of 760 mm of Hg A 76 mm of Hg B 160 mm of Hg C 120 mm of Hg D 140 mm of Hg High-Yield Explanation Paial pressure of oxygen at atmospheric pressure is 160 mm HG Ref: guyton and hall textbook of medical physiology 12 edition page number:311,312,313