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Which one of the following is secreted by Pnuemocyte type-II cells?(a) Actin(b) Lecithin(c) Mucous(d) LysineI got this question in quiz.My doubt is from Human Respiratory System in chapter Breathing and Exchange of Gases of Biology – Class 11

Answer»

Correct option is (B) Lecithin

To elaborate: Pnuemocyte type-I HELP in gaseous exchange whereas Pnuemocyte type-II secretes lecithin, which act as surfactant and PREVENTS COLLAPSING of alveoli by reducing the surface tension.



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