12. The graph shows values of arterial plasma bicarbonate concentration and pH for different persons Line X gives the combination of HCO, and pH found at a Pco, of 40 mm Hg Line Y gives the values of pH and HCO,-found when the Pco, of a normal blood sample is varied. Which of the following labeled points on the graph indicates metabolic alkaliosis? OA) PLASMA (HCO3-) mM/L 30 25- 20 10 5 0 7.0 A 7.1 OB) ç 7.2 7.7 7.8 7.9 7.5 7.6 7.3 7.4 pH OF ARTERIAL PLASMA OC) OD) OE)

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