Select the correct statement about oxygen transport in blood:
A) During normal activity,a molecule of hemoglobin returning to the lungs carries one molecule of O2.
B) Increased BPG levels in the red blood cells enhance oxygen- carrying capacity.
C) During conditions of acidosis,hemoglobin is able to carry oxygen more efficiently.
D) A 50% oxygen saturation level of blood returning to the lungs might indicate an activity level higher than normal.
Correct Answer:
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