A) is a protein produced by type II alveolar cells
B) is excessive in many premature infants resulting in difficulties in breathing
C) Decreases the surface tension of the fluid lining the alveoli
D) is lacking in individuals suffering from acute respiratory distress syndrome
Correct Answer: C
Solution :
Surfactant is a surface active agent in water, which means that it greatly reduces the surface tension of water. It is secreted by special epithelial cells called type-II alveolar epithelial cells, which constitute about 10% of the surface area of alveoli.
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