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  #1  
Old 07-02-2011
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Heart Blood shunting @ Ductus arteriosus

during fetal life what is function of ductus arteriosus?

a)it shunts deoxygenated blood from aorta to pulmonary artery
b)it shunts oxygenated blood from from aorta to pulmonary artery
c)it shunts deoxygenated blood from pulmonary artery top aorta
d)becomes ligamentum teres
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Old 07-02-2011
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c) it shunts deoxygenated blood from pulmonary artery top aorta
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Old 07-02-2011
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c) deoxy blood from pulmonary artery to aorta...ligamentum teres is remnant of the umbilical vein in the adult. ductus arteriosus remnant is ligamentum arteriosum.
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Old 07-02-2011
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c) it shunts deoxygenated blood from pulmonary artery to aorta

During fetal development, pressure in right side of heart is higher than left side due to high pulmonary resistance, so we have right to left shunt
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Old 07-03-2011
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the answer is C
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c)it shunts deoxygenated blood from pulmonary artery top aorta
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Old 07-03-2011
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answer is c..
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Old 07-03-2011
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Correct Answer Correct answer

correct answer is

(C)

though a lot students @ kaplan including me GOT THIS ONE WRONG..
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Old 07-04-2011
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Quote:
Originally Posted by usluipek View Post
c) it shunts deoxygenated blood from pulmonary artery to aorta

During fetal development, pressure in right side of heart is higher than left side due to high pulmonary resistance, so we have right to left shunt
Yes this is a very important concept, it switches to a left to right shunt later if it remains persistent/open
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