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A-LevelBiologyTransport in mammals9700/12 · Feb/Mar 2025 · Q311 Mark

What happens as a result of the blood pressure in the left ventricle becoming higher than the blood pressure in the left atrium?

AThe left atrioventricular valve closes.
BThe left atrioventricular valve opens.
CThe semilunar valve in the aorta closes.
DThe semilunar valve in the aorta opens.

✓ Correct answer

A: The left atrioventricular valve closes.

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About this question

Topic
Transport in mammals, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source
A-Level Biology, Feb/Mar 2025 Paper 1 Variant 2, question 31.

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