Which statement below accurately describes the role of the ductus arteriosus?
The ductus arteriosus helps connect the umbilical artery to the inferior vena cava.
The ductus arteriosus only carries oxygenated blood from the left side of the heart to the right side.
The ductus arteriosus is found between the right and left atrium.
In fetal circulation, the pulmonary artery and aorta are connected via the ductus arteriosus.
The Correct Answer is D
Choice A rationale
The ductus arteriosus does not connect the umbilical artery to the inferior vena cava. It connects the pulmonary artery to the aorta, bypassing the lungs in fetal circulation.
Choice B rationale
The ductus arteriosus carries deoxygenated blood from the right side of the heart to the aorta. It does not carry oxygenated blood from the left side of the heart.
Choice C rationale
The ductus arteriosus is not located between the right and left atrium. It is a blood vessel connecting the pulmonary artery to the aorta in fetal circulation.
Choice D rationale
In fetal circulation, the pulmonary artery and aorta are connected via the ductus arteriosus. This allows blood to bypass the fetal lungs, which are not yet functional.
NGN QUESTIONS
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["B","D"]
Explanation
Choice A rationale
Amniocentesis assesses fetal lung maturity, genetic disorders, and infections, not preeclampsia. Preeclampsia diagnosis involves blood pressure, proteinuria, and other lab tests. Normal blood pressure: <120/80 mm Hg. Proteinuria: >300 mg/day.
Choice B rationale
A non-stress test measures fetal heart rate response to movements, evaluating fetal well-being. Normal fetal heart rate: 110-160 bpm. Accelerations: 15 bpm increase for at least 15 seconds.
Choice C rationale
Chorionic villus sampling assesses chromosomal abnormalities, genetic disorders, not neural tube defects. Neural tube defect screening: maternal serum alpha-fetoprotein levels, ultrasound. Normal alpha-fetoprotein: 0.5-2.5 MoM.
Choice D rationale
A full bladder helps lift the uterus for better visualization during ultrasound, especially in early pregnancy. This improves image quality for assessing fetal development and other structures.
Choice E rationale
Oral glucose tolerance test assesses gestational diabetes by measuring blood glucose levels, not fetal activity. Normal fasting blood glucose: <95 mg/dL. 1-hour post-glucose: <180 mg/dL.
Correct Answer is A
Explanation
Choice A rationale
Ultrasonography provides the most accurate assessment of gestational age, especially in the first trimester, by measuring the crown-rump length.
Choice B rationale
HCG levels can indicate pregnancy but are not as accurate for determining the exact gestational age.
Choice C rationale
Nagele's rule is based on the menstrual cycle and may not be accurate if cycles are irregular.
Choice D rationale
Fundal height measurement is less accurate in early pregnancy and more useful in later trimesters.
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