MHT CET Biology question

Bicuspid and tricuspid valves opens when

(A)Blood from the pulmonary artery and vena cava flows into the left and right ventricles respectively
(B)Blood from the pulmonary vein and vena cava flows into left and right ventricles respectively
(C)Blood from the pulmonary vein and vena cava flows into left and right atrium respectivelyCorrect
(D)Oxygen from the pulmonary vein and vena cava flows into left and right atrium respectively

Answer: (C)

Solution

The AV valves open during atrial filling/ventricular filling when blood from the pulmonary veins and venae cavae has entered the left and right atria, so the pressure lets blood pass into the ventricles;

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Question ID VK-078132