A-LevelBiologyGas exchange9700/12 · May/June 2011 · Q321 Mark
What are the approximate diameters of a trachea, an alveolus, a bronchiole and a bronchus? [Figure: Table with columns 'trachea/mm', 'alveolus/mm', 'bronchiole/mm', 'bronchus/mm']
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A18 0.25 0.50 12
B18 0.50 0.25 12
C12 0.25 0.50 18
D12 0.50 0.25 18
✓ Correct answer
A: 18 0.25 0.50 12
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