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After a baby is born, there is normally a fall in 

A. Its systemic vascular resistance. 

B. Its pulmonary vascular resistance. 

C. Direct flow from pulmonary artery to aorta. 

D. Direct flow from right to left atrium. 

E. Direct flow from right to left ventricle.

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A. False This rises due to closure of the umbilical arteries. 

B. True Due to expansion of the lungs and their blood vessels. 

C. True Flow in the ductus arteriosus reverses due to (A) and (B). 

D. True Again due to reversal of the pressure gradient. 

E. False Normally there is no opening in the intraventricular septum.

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