A-LevelBiologyGas exchange9700/12 · May/June 2010 · Q401 Mark

The diagram shows a spirometer trace with tidal volume and vital capacity. [Figure 40.1] What happens to the volumes labelled X and Y during moderate exercise?

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Avolume X: decreases; volume Y: decreases

Bvolume X: decreases; volume Y: increases

Cvolume X: increases; volume Y: decreases

Dvolume X: increases; volume Y: increases

✓ Correct answer

A: volume X: decreases; volume Y: decreases

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Topic: Gas exchange, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, May/June 2010 Paper 1 Variant 2, question 40.

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