A-LevelBiologyTransport in mammals9700/12 · Oct/Nov 2017 · Q321 Mark

The graph shows changes in the volume of the ventricles during the cardiac cycle. [Figure 32.1 - graph showing changes in ventricular volume during cardiac cycle] Which valves open and close at P and R?

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Aatrioventricular valve at P: closes, semilunar valve at R: closes

Batrioventricular valve at P: closes, semilunar valve at R: opens

Catrioventricular valve at P: opens, semilunar valve at R: closes

Datrioventricular valve at P: opens, semilunar valve at R: opens

✓ Correct answer

A: atrioventricular valve at P: closes, semilunar valve at R: closes

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Topic: Transport in mammals, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, Oct/Nov 2017 Paper 1 Variant 2, question 32.

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