Q:

Which of the following events occur during late ventricular diastole?

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Which of the following events occur during late ventricular diastole?


  1. the atria are relaxed, the ventricles are filling passively, the atrioventricular valves are open
  2. the ventricles are starting to contract, the atrioventricular valves are closed, the semilunar valves are open
  3. the atria contract, the ventricles are relaxed, the atrioventricular valves are open
  4. the atria are relaxed, the ventricles are starting to relax, the atrioventricular valves are closed, the semilunar valves are closed.

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C: Choice A describes early diastole. Towards the end of diastole, the atria contract to push any blood they contain into the ventricles.

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