A-LevelBiologyGas exchange9700/12 · May/June 2019 · Q321 Mark
Which tissues are present in the walls of a trachea and an alveolus?
Atrachea: epithelium with goblet cells ✓, smooth muscle ✓; alveolus: epithelium with goblet cells x, smooth muscle x
Btrachea: epithelium with goblet cells ✓, smooth muscle ✓; alveolus: epithelium with goblet cells x, smooth muscle ✓
Ctrachea: epithelium with goblet cells ✓, smooth muscle x; alveolus: epithelium with goblet cells ✓, smooth muscle ✓
Dtrachea: epithelium with goblet cells x, smooth muscle x; alveolus: epithelium with goblet cells x, smooth muscle x
✓ Correct answer
A: trachea: epithelium with goblet cells ✓, smooth muscle ✓; alveolus: epithelium with goblet cells x, smooth muscle x
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