O-LevelBiologyRespiration5090/11 · May/June 2011 · Q161 Mark

What happens to the diaphragm when breathing in?

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Acontraction domed

Brelaxation domed

Ccontraction flattened

Drelaxation flattened

✓ Correct answer

C: contraction flattened

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Topic: Respiration, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2011 Paper 1 Variant 1, question 16.

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