Biology 0610 · IGCSE · Heart

Heart — practice question

What occurs in the heart as blood moves from the atria into the ventricles?

  • Aatria muscles: contract; atrioventricular valves: close; ventricle muscles: relax
  • Batria muscles: contract; atrioventricular valves: open; ventricle muscles: relax
  • Catria muscles: relax; atrioventricular valves: close; ventricle muscles: contract
  • Datria muscles: relax; atrioventricular valves: open; ventricle muscles: contract

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