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MCAT Question A Day - 8/8/14

In the congenital heart defect known as patent ductus arteriosus, the ductus arteriosus, which connects the aorta and the pulmonary arteries during fetal development, fails to close at birth. This will likely lead to all of the following EXCEPT:

A.  equal, or increased, oxygen concentration in the blood that reaches the systemic tissues.
B.  increased oxygen concentration in the blood that reaches the lungs.
C.  increased work load imposed on the left ventricle.
D.  increased work load imposed on the right ventricle.

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