[问答题]
Premature babies sometime
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p icx:aqo2+ z8 eonx q/3*)7qfh3vvat m infant respiratory distress syndrome, which could
*zithaq pv /f xq27+e8:va3nco o) xq3 be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram below shows two different alveoli structures.
1.Describe one feature of the surfactant.
2.Suggest a treatment for infant respiratory distress syndrome.
3.Draw a labelled diagram of the structures in an alveolus that are important for gas exchange.