O-LevelBiologyTransport in Humans5090/11 · Oct/Nov 2018 · Q141 Mark

The diagram shows a section through the human heart. [Figure showing a section through the human heart with labels P, Q, R, S, T, U] Which suggests that blood leaves the heart at different pressures, when going to the lungs and to the body?

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.

AChambers R and S have different volumes.

BThe walls of the atria are thinner than the walls of the ventricles.

CValve P is stronger than valve Q.

DWall T is more muscular than wall U.

✓ Correct answer

D: Wall T is more muscular than wall U.

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Topic: Transport in Humans, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2018 Paper 1 Variant 1, question 14.

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