O-LevelBiologyTransport in Humans5090/11 · May/June 2025 · Q191 Mark
The table shows information about three different blood vessels, P, Q and R. One of the vessels is an artery, one is a capillary and one is a vein. Using the information from the table, what is the cross-sectional area of the lumen of the vein? (Assume π = 3.14)
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.
A12.6 mm²
B19.6 mm²
C50.2 mm²
D78.5 mm²
✓ Correct answer
B: 19.6 mm²
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