A patient is breathing air at sea level and has a respiratory exchange ratio of 1.0. The aerial blood values are: PO2 90 mm Hg ;PCO2 20 mm Hg and pH 7.30. These indicate that the:
Alveolar-aerial PO2 difference exceeds 20 mm Hg. Plasma bicarbonate concentration is low Patient is hyperventilating All of the above