The nurse is reviewing fetal circulation with a pregnant patient and explains that blood circulates through the placenta to the fetus. What is the function of ductus arteriosus?
Select one:
Lungs bypass
Brain bypass
Liver bypass
Cardiac bypass
The Correct Answer is A
a. The function of the ductus arteriosus is to bypass the lungs in fetal circulation, allowing oxygenated blood from the placenta to be shunted directly to systemic circulation.
b. Ductus arteriosus does not bypass the brain; it specifically bypasses the lungs.
c. Ductus venosus shunts blood away from the liver, not the ductus arteriosus.
d. Ductus arteriosus shunts blood away from the lungs, not the heart itself.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
a. This occurs when some of the products of conception have been expelled from the uterus but some remain.
b. This occurs when all of the products of conception have been expelled from the uterus.
c. This occurs when the fetus has died but has not been expelled from the uterus.
d. This occurs when the fetus has died and the cervix is dilated, but the products of conception have not been expelled from the uterus.
Correct Answer is A
Explanation
a. Amenorrhea, or the absence of menstrual periods, is a presumptive sign of pregnancy that occurs around the time of implantation of the fertilized egg.
b. A positive pregnancy test is a probable sign of pregnancy that can occur as early as 7-10 days after conception.
c. Chadwick's sign, or the bluish discoloration of the cervix and vagina, is a probable sign of pregnancy that typically occurs around 6-8 weeks of gestation.
d. Hegar's sign, or the softening of the lower uterine segment, is a probable sign of pregnancy that typically occurs around 6-12 weeks of gestation.
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