O-LevelBiologyRespiration5090/11 · Oct/Nov 2019 · Q171 Mark

What happens during expiration?

Acontract, falls and then rises, decreases

Brelax, rises and then falls, decreases

Ccontract, rises and then falls, increases

Drelax, falls and then rises, increases

✓ Correct answer

B: relax, rises and then falls, decreases

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Topic: Respiration, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2019 Paper 1 Variant 1, question 17.

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