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Q78) Alveoli become enlarged and damaged with reduced surface area in heavy smokers. the condition is called ...[ kerala 2044 ]

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In emphysema, the bronchi and bronchioles are inflamed and continually swollen and clogged. This causes the alveoli to swell. These fragile air sacs burst and merge together. This damage to the alveoli makes it more difficult for the transfer of oxygen and carbon dioxide to take place.It is usually caused by cigarette smoking
Answer : (b)