In the following graph, the curve A represents the normal relationship between alveolar ventilation and pCO2, when pO2, is 100 mm Hg. lf pH is changed from 7 .4 to 7 .3, where will the original curve shift?
Ans: D. D
(Ref Ganong 25/e p661. Guyton 13/e p542-544)
- C and B: Progressive hypoxia without change in pH.
- D: Only pH change without additional hypoxia.
- E: Hypoxia as well as pH change.