⭕ Answer this question.... with Explnation of third part. Thanks ☺️
(i) Diaphragm contracts to help in (1) inspiration while the contraction of abdominal muscles helps in (2) forced expiration.
(ii) Vital capacity of trained athletes is (3) higher than that of non-athletes while the vital capacity of non-smokers is (4) higher than that of smokers.
(iii) Alveolar PO2 is (5) higher than the venous PO2 while arterial PO2 is (6) lower than the alveolar PO2.
So, the correct answer is option c : (1)-inspiration, (2)-forced expiration, (3)-higher, (4)-higher.
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