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O-LevelBiologyTransport in Humans5090/12 · May/June 2017 · Q161 Mark

What lines the walls of alveoli?

Acarpet of cilia
Bfilm of moisture
Cnetwork of veins
Dthin sheet of muscle

✓ Correct answer

B: film of moisture

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About this question

Topic
Transport in Humans, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source
O-Level Biology, May/June 2017 Paper 1 Variant 2, question 16.

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