In a resting person, saturation of haemoglobin as blood leaves the tissue capillaries is approximately

75%

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40%

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46%

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Solution

The correct option is A 75%
The partial pressure in deoxygenated blood returning from body tissue is about 40mm Hg and . at this $P_{O_{2}}$ , the saturation of haemoglobin is about 70 to 75%.

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Similar questions

Which of the following would have the same $O_{2}$ content?

Question 24
The blood leaving the tissues becomes richer in

(a) carbon dioxide
(b) water
(c) haemoglobin
(d) oxygen

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