NEET Biology question

BiologyBreathing and Exchange of GasesNEET

Consider the following four statements and select the correct option stating which ones are true (T) and which ones are false (F). (i) Expiration is normally brought about by the relaxation of inspiratory muscles. (ii) Oxyhaemoglobin can hold much less carbon dioxide in the form of carbaminohaemoglobin than what deoxyhaemoglobin can. (iii) A person can expel all the air from the lungs by a forceful expiration. (iv) A rise in pCO increases the oxygen-affinity of haemoglobin.

Answer: (D)

Solution

Normal expiration is indeed a passive process caused by relaxation of the inspiratory muscles (i-True); by the Haldane effect, oxygenated haemoglobin binds far less CO as carbaminohaemoglobin than deoxygenated haemoglobin does (ii-True); no person can ever

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Question ID VK-119309