In a person breathing room air (and with all else being normal), if the alveolar PCO2 rises from 40-70 mm Hg, what would you expect?
A. PAO2 to fall by about 30 mm Hg
b. PAO2 to fall by about 40 mm Hg
c. PAO2 to rise by about 30 mm Hg
d. PAO2 to rise about 40 mm Hg
Based on alveolar air equation, if the FIO2 remains constant, then the PAO2 must vary inversely with the PACO2