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Question
Which of the following statement(s) is (are) true about respiration?
- During inhalation, ribs move inward and the diaphragm is raised
- In the alveoli, exchange of gases takes place i.e., oxygen from alveolar air diffuses into blood and carbon dioxide from the blood into the alveolar air
- Haemoglobin has a greater affinity for carbon dioxide than oxygen
- Alveoli increase surface area for the exchange of gases
Options
(i) and (iv)
(ii) and (iii)
(i) and (iii)
(ii) and (iv)
Solution
(ii) and (iv)
Explanation -
Statement i) is wrong because ribs move outward and the diaphragm is lowered during inhalation. Similarly Option iii) is wrong because Hemoglobin has a greater affinity for Oxygen than CO2.
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