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Question

Which of following statements is not true?


A

The partial pressure of oxygen in deoxygenated blood is 40 mm Hg

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B

The partial pressure of oxygen in oxygenated blood is 95 mm Hg

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C

The partial pressure of oxygen in the alveolar air is 104 mm Hg

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D

The partial pressure of carbon dioxide in the alveolar air is 40 mm Hg

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E

The partial pressure of carbon dioxide in deoxygenated blood is 95 mm Hg

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Solution

The correct option is E

The partial pressure of carbon dioxide in deoxygenated blood is 95 mm Hg


The partial pressure of carbon dioxide in the deoxygenated blood is 45 mm Hg, not 95 mm Hg, therefore CO2 passes from blood to alveoli.
The other statements are true.


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