Biology 9700 · AS & A Level · The heart

The heart — practice question

What is the correct order in which the valves of the mammalian heart open during one cardiac cycle?

  • Aright atrioventricular valve → pulmonary semilunar valve → left atrioventricular valve → aortic semilunar valve
  • Bleft atrioventricular valve → aortic semilunar valve → right atrioventricular valve → pulmonary semilunar valve
  • Cleft atrioventricular valve and aortic semilunar valve → right atrioventricular valve and pulmonary semilunar valve
  • Dleft atrioventricular valve and right atrioventricular valve → aortic semilunar valve and pulmonary semilunar valve

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