A-LevelBiologyGas exchange9700/12 · Feb/Mar 2022 · Q361 Mark
The photomicrograph shows a cross-section of part of the gas exchange system of a mammal. What is shown by the line labelled V? [Figure 36.1]
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Athe diameter of an alveolus
Bthe diameter of a bronchiole
Cthe diameter of a capillary
Dthe diameter of a trachea
✓ Correct answer
B: the diameter of a bronchiole
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