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Question

In humans, blood passes from the ventricles to pulmonary artery and aorta due to


A

Increase in atrial pressure

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B

Increase in ventricular pressure

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C

Decrease in ventricular pressure

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D

Suction pull

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Solution

The correct option is B

Increase in ventricular pressure


Increase in the pressure within ventricles during systole gets passed on to the walls of the great vessels (aorta & pulmonary artery). Blood pressure is just the pressure exerted by the contraction of heart on the walls of arteries. Blood can flow through the vessels and maintain unidirectionality due to this action.


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