KVPY SA Exam 2012 Question Paper

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Question : 77 of 80

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In mammals, pleural membranes cover the lungs as well as insides of the rib cage. The pleural fluid in between the two membranes

dissolves oxygen for transfer to the alveoli
dissolves $CO_2$ for transfer to the blood
provides partial pressure
reduces the friction between the ribs and the lungs

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