Choose correct set of statements about ventricular systole.
(a) ‘Lub’ sound is produced.
(b) Ventricular filling occurs.
(c) Semilunar valves close due to raise in ventricular pressure.
(d) Blood flows from ventricles into circulatory pathways.

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a, b

b, c

a, d

a, c

answer is C.

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Detailed Solution

During ventricular systole, AV valves close (lub sound is produced) and semilunar valves open. This allows flowing of blood into aorta.

Ventricular filling starts in joint diastole and continues during atrial systole.

Semilunar valves open due to raise in ventricular pressure.

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