A-LevelBiologyTransport in mammals9700/12 · May/June 2019 · Q311 Mark

The large arteries close to the heart have a thick elastic layer in their walls. Which statements about this layer are correct? 1 helps to maintain the blood pressure in arteries 2 reduces friction within the arteries 3 prevents too much pressure bursting the artery wall

A1, 2 and 3

B1 and 3 only

C1 only

D2 and 3 only

✓ Correct answer

B: 1 and 3 only

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Topic: Transport in mammals, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, May/June 2019 Paper 1 Variant 2, question 31.

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