NEET Biology question

Which fact suggests that most oxygen is transported from lungs to the tissues combined with haemoglobin rather than dissolved in blood plasma?

(A)Oxygen carrying capacity of whole blood is much higher than that of plasma and oxygen content of blood leaving the lungs is greater than that of blood entering the lungsCorrect
(B)Haemoglobin can combine with oxygen
(C)Oxyhaemoglobin can dissociate into haemoglobin and oxygen
(D)Increase in carbon dioxide concentration decreases the oxygen affinity of haemoglobin

Answer: (A)

Solution

The key evidence is quantitative — whole blood (with haemoglobin) carries far more oxygen than plasma alone could dissolve, and the oxygen content of blood rises sharply after

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Question ID VK-119051