[问答题]
Premature babies sometim
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h.,7rf f-dqfuffer from infant respiratory distress syndrome, which could be caused by a lack of sufficient sur
h,qru 7d.fff -factant 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.