NEET UG BIOLOGY MCQ: BREATHING AND EXCHANGE OF GASES

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What happens to the respiratory process in a man-going up a hill?

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Correct option: B

P{O_2} \downarrow ,\,\,RBC \uparrow ,\,\,{\text{Breathing}}\,\,{\text{rate}} \uparrow

Option B (

PO_2 \downarrow , RBC \uparrow , \text{Breathing rate} \uparrow

) is correct because at higher altitudes, the partial pressure of oxygen decreases, stimulating increased RBC production and a higher breathing rate to compensate for the lower oxygen availability.

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