O-LevelBiologyTransport in Humans5090/11 · Oct/Nov 2010 · Q171 Mark

What happens to the muscles of the diaphragm, the external intercostal muscles and the position of the diaphragm when breathing in? [Table]

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

Acontract contract downward

Bcontract relax upward

Crelax contract upward

Drelax relax downward

✓ Correct answer

A: contract contract downward

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Topic: Transport in Humans, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2010 Paper 1 Variant 1, question 17.

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