A-LevelBiologyTransport in mammals9700/12 · May/June 2024 · Q291 Mark

The diagram shows pressure changes in the left side of the heart during the cardiac cycle. [Graph showing pressure changes in the left side of the heart during the cardiac cycle with point X labelled] What happens in the heart at X?

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.

AThe atrioventricular valves close.

BThe atrioventricular valves open.

CThe semilunar valves close.

DThe semilunar valves open.

✓ Correct answer

A: The atrioventricular valves close.

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Topic: Transport in mammals, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, May/June 2024 Paper 1 Variant 2, question 29.

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