O-LevelBiologyTransport in Humans5090/11 · May/June 2025 · Q181 Mark
The table shows the range of percentages of different types of tissue found in the walls of the aorta of people of different ages. Collagen tissue is present in the walls of blood vessels to provide strength and support. Which conclusion about the range of percentages is correct?
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 range of collagen tissue found in people of both age groups is 39.
BThe range of each type of tissue is smaller in old adults than in young adults.
CThe range of muscle tissue in old adults is four times greater than in young adults.
DThe range of elastic tissue in people of both age groups is the greatest of all three types of tissue.
✓ Correct answer
C: The range of muscle tissue in old adults is four times greater than in young adults.
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