Question

100 ml of blood contains 15 g of haemoglobin and each gram of haemoglobin combines with 1.34 ml of oxygen. What will be the volume of oxygen in the haemoglobin of arterial blood?

• A. 19.4 ml
• B. 20.1 ml
• C. 14.4 ml
• D. 15 ml

Answer 1

The correct option is A

19.4 ml

Only 97% of oxygen is transported by haemoglobin, rest 3% is dissolved in plasma. Although 15 X 1.34 gives a value of 20.1 ml of oxygen, we must remember that only 97% of the total oxygen is combined with haemoglobin and the 97% of 20.1 is 19.4. Thus, the correct answer is option A