What is the partial pressure of carbon dioxide in alveolar air and in deoxygenated blood respectively?

What is the partial pressure of carbon dioxide in alveolar air and in deoxygenated blood respectively? Correct Answer 40 mm Hg, 45 mm Hg

In alveolar air, partial pressure of carbon dioxide is 40 mm Hg and its value in deoxygenated blood is 45 mm Hg. So, carbon dioxide moves from arterial blood to alveoli. In this way, according to partial pressure exchange of gases takes place.
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