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Which of the followig statements are ...

Which of the followig statements are true about surfactants ?
(i) Thin non- cellular films made of protein and phospholipids - covering alveolar membrane.
(ii) Their synthesis begins only after the `25^(th)` week of gestation .
(iii) They lower the surface tension in the alveoli and prevents the lungs from collapsing.
(iv) They are synthesised and secreted by type II cells of the squamouse epithelial cells of alveoli.

A

(i) and (ii) are true, (iii) and (iv) are false

B

(ii) and (iii) are true, (i) and (iv) are false

C

All are true

D

All are false

Text Solution

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All are true
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