Passage VII
The amount of O2 present in blood and tissues can be measured, in mm Hg, as the partial pressure of O2 (
). The percent saturation of Hb is the percent of hemoglobin in the blood that is bound with O2. Figure 1 shows the relationship between percent saturation of Hb and , at normal body conditions.
Figure 2 shows the relationship between percent saturation of Hb and , at different pHs. The pH of blood is affected by the partial pressure of CO2 ().
Figure 3 shows the relationship between percent saturation of Hb and , at different blood temperatures.
37. Based on Figures 2 and 3, if blood has a of 40 mm Hg, the amount of oxygen bound to Hb would be greatest at which of the following sets of conditions?
Your Answer is
Correct Answer is A
Explanation
It can be seen from figure 2 that when the abscissa is 40, the ordinate of High blood pH (7.6) is the highest; see figure 3, when the abscissa is 40, the ordinate corresponding to 10°C is the highest