Which of the following statements are true about respiration? 1m
fi) During inhalation, ribs move inward and diaphragm is raised
(ii) In the alveoli, exchange of gases takes place i.e., oxygen from alveolar
air diffuses into blood and carbon dioxide from blood into alveolar air
(iii) Haemoglobin has greater affinity for carbon dioxide than oxygen
(iv) Alveoli increase surface area for exchange of gases
1) (i) and (iv) 2) (ii) and (iii) 3) (i) and (ii)
4) (ii) and (iv)
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Answer:
correct option is 4 .
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