A-LevelBiologyGas exchange9700/12 · May/June 2025 · Q351 Mark
Which row shows the tissues that are present in the wall of the trachea and the wall of the bronchus?
Acartilage: ✓, ciliated epithelium: ✓, smooth muscle: ✓
Bcartilage: ✓, ciliated epithelium: ✓, smooth muscle: X
Ccartilage: ✓, ciliated epithelium: X, smooth muscle: X
Dcartilage: X, ciliated epithelium: ✓, smooth muscle: X
✓ Correct answer
A: cartilage: ✓, ciliated epithelium: ✓, smooth muscle: ✓
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