As a result, the " oxygen saturation curve ", which plots percent saturation " vs . " pO 2, is left-shifted for fetal hemoglobin as compared to adult hemoglobin.
12.
This may not occur if p _ w itself is dropping rapidly, depending on the slope of the saturation curve, the lapse rate, and the speed of the updraft, or if the drop of p is slow, depending on the number and size of the ice crystals.