The partial pressure of oxygen in the alveoli of the lungs is

A equal to that in the blood
B more than that in the blood
C less than that in the blood
D less than that of carbon dioxide.

Verified Solution

Answer & Solution

Correct Answer

(B) more than that in the blood

Step-by-step Solution

Detailed explanation

(b) : The partial pressure of oxygen in alveolar air is \(104\ mm\ Hg\) whereas it is \(40\ mm\ Hg\) in deoxygenated blood and \(95\ mm\ Hg\) in oxygenated blood.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

Match the organisms in Column\(-I\) with habitats in Column\(-II\)

Column\(-I\)	Column\(-II\)
\((a)\) Halophiles	\((i)\) Hot springs
\((b)\) Thermoacidophiles	\((ii)\) Aquatic environment
\((c)\) Methanogens	\((iii)\) Guts of ruminants
\((d)\) Cyanobacteria	\((iv)\) Salty area

Select the correct answer from the options given below

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