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Cardiac Cycle

During active...

Question

During active ventricular filling which of the following happen?

A

Atria contract

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B

Ventricles contract

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C

Atria relax

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D

Ventricles relax

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Solution

The correct option is D Ventricles relax
When atria contract, they pump blood into ventricles. This is called active ventricular filling.

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A. Joint diastole- 70% of ventricular filling
B. Ventricular diastole- 25% ventricular filling
C. Isovolumetric contraction- 20% of ventricular filling
D. Isovolumetric relaxation- 30% of ventricular filling

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ii. During the end of ventricular systole the semilunar valves open up.
iii. During the start of the ventricular systole the bicuspid and tricuspid valves close
iv. Due to the closure of the atrio-ventricular valves, dup sound is produced.

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