A-LevelBiologyGas exchange9700/12 · May/June 2022 · Q351 Mark
Which statements about the human gas exchange system are correct? 1 The absence of cartilage in small bronchioles allows them to expand. 2 The walls of the alveoli are made of cuboidal epithelium. 3 Alveoli secrete a substance which reduces surface tension. 4 The trachea and bronchi are supported by rings of cartilage.
A1 and 2
B1 and 3
C2 and 4
D3 and 4
✓ Correct answer
B: 1 and 3
Practise more questions on this topic
Oracle Prep sorts past-paper questions by topic, so you can drill Gas exchange and see which topics are most likely to come up next.
Sign up free →