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O-LevelBiologyTransport in Humans5090/12 · May/June 2021 · Q141 Mark

The diagram shows how the volume of blood in the left ventricle of a human heart changes during one heart beat. When is the left ventricle contracting? [Figure 14.1]

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AA
BB
CC
DD

✓ Correct answer

B: B

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Topic
Transport in Humans, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source
O-Level Biology, May/June 2021 Paper 1 Variant 2, question 14.

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