What is the paial pressure for carbon-di-oxide in the inspired air?: (A) 0.3 mm Hg, (B) 158 mm Hg, (C) 100 mm Hg, (D) 32 mm Hg
Answer is A. Paial pressure of CO2 in inspired air (Pi CO2) - 0.3 mm Hg Carbon-di-oxide: Paial pressure of CO2 in inspired air (Pi CO2) 0.3 mm Hg Paial pressure of CO2 in alveolar blood (PA CO2) 40 mm Hg Paial pressure of CO2 in expired air (PE CO2) 32 mm Hg.