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A-LevelBiologyTransport in mammals9700/12 · Feb/Mar 2021 · Q291 Mark

Which row correctly describes the heart during atrial systole?

Awall of ventricle: contracted atrioventricular valve: closed semilunar valve: closed
Bwall of ventricle: contracted atrioventricular valve: open semilunar valve: open
Cwall of ventricle: relaxed atrioventricular valve: closed semilunar valve: open
Dwall of ventricle: relaxed atrioventricular valve: open semilunar valve: closed

✓ Correct answer

D: wall of ventricle: relaxed atrioventricular valve: open semilunar valve: closed

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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 2021 Paper 1 Variant 2, question 29.

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