A-LevelBiologyGas exchange9700/12 · May/June 2016 · Q331 Mark

Which components of the human gas exchange system help to reduce the effects of carcinogens in tar?

Acilia and goblet cells only

Bcilia and mucous glands only

Cmucous glands and goblet cells only

Dmucous glands, goblet cells and cilia

✓ Correct answer

D: mucous glands, goblet cells and cilia

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Topic: Gas exchange, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, May/June 2016 Paper 1 Variant 2, question 33.

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