alkalosis. The pH of arterial blood from calves increased from
1 month to 6 months of age (P , 0.001). Mean arterial CO2
tension decreased from 1 month to 3 months (P , 0.001)
and from 1 month to 6 months of age (P = 0.006), indicating
more pronounced hyperventilation, and therefore respiratory
alkalosis, with increasing age.