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NEET UG BIOLOGY MCQ: BREATHING AND EXCHANGE OF GASES
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Assertion (A) Bohr’s effect occurs at the level of alveoli of
lungs
Reason (R) It occurs when high concentration of
decreases the affinity of haemoglobin to oxygen.
lungs
Reason (R) It occurs when high concentration of
decreases the affinity of haemoglobin to oxygen.
View answer and explanation
Correct option: D
If A is false, but R is true
Option D (If A is false, but R is true) is correct. Bohr's effect occurs at the tissues, not the alveoli, and is indeed caused by high CO2 concentration decreasing hemoglobin's affinity for oxygen.
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suffocation.
Reason : Atmospheric air contains far less
oxygen content than the dissolved oxygen in
water. The faster breathing in high fever is due to the