A-LevelBiologyGas exchange9700/12 · Oct/Nov 2011 · Q331 Mark
Which row shows a correct location of cartilage and smooth muscle in the human gas exchange system?
Acartilage: respiratory bronchioles
smooth muscle: terminal bronchioles
Bcartilage: respiratory bronchioles
smooth muscle: trachea
Ccartilage: trachea
smooth muscle: bronchi
Dcartilage: trachea
smooth muscle: respiratory bronchioles
✓ Correct answer
C: cartilage: trachea smooth muscle: bronchi
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