A-LevelBiologyTransport in mammals9700/12 · May/June 2023 · Q341 Mark

The diagrams show the valves in the heart when viewed in cross-section from above at different stages in the cardiac cycle. [Figure 34.1] (diagram 1) [Figure 34.2] (diagram 2) Which stages in the cardiac cycle are shown?

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Adiagram 1: diastole; diagram 2: ventricular systole

Bdiagram 1: atrial systole; diagram 2: diastole

Cdiagram 1: ventricular systole; diagram 2: diastole

Ddiagram 1: diastole; diagram 2: atrial systole

✓ Correct answer

A: diagram 1: diastole; diagram 2: ventricular systole

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Topic: Transport in mammals, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, May/June 2023 Paper 1 Variant 2, question 34.

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