In the plasma, the quantity of oxygen in solution is ________. A. about equal to the oxygen combined with hemoglobin B. not present except where it is combined with carrier molecules C. greater than the oxygen combined with hemoglobin D. only about 1.5% of the oxygen carried in dissolved form
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Correct answer is d ( only about 1.5% of the oxygen carried in dissolved form).
In the plasma, the quantity of oxygen in solution is only about 1.5% of the oxygen carried in dissolved form.
Oxygen is carried in the blood in two forms: (1) dissolved in plasma and RBC water (about 2% of the total) and (2) reversibly bound to hemoglobin (about 98% of the total). At physiological PO2 (40 < PO2 < 100 mm Hg), only a small amount of oxygen is dissolved in plasma since oxygen has such a low solubility.