A pregnant client asks about the functions of the placenta.Which of the following items should the nurse NOT include in the teaching plan?
Fetal nutrition and excretion are carried out by the placenta.
Fetal respirations are carried out by the placenta.
The placenta filters harmful substances from maternal blood.
The placenta receives maternal blood from the uterine arteries.
The Correct Answer is C
Choice A rationale
Fetal nutrition and excretion are carried out by the placenta. This statement is correct. The placenta provides essential nutrients to the fetus and removes waste products from fetal blood.
Choice B rationale
Fetal respirations are carried out by the placenta. This statement is correct. The placenta facilitates gas exchange, providing oxygen to the fetus and removing carbon dioxide.
Choice C rationale
The placenta filters harmful substances from maternal blood. This statement is incorrect. While the placenta provides some barrier function, it does not filter all harmful substances from maternal blood, and certain drugs and toxins can cross the placental barrier and affect the fetus.
Choice D rationale
The placenta receives maternal blood from the uterine arteries. This statement is correct. Maternal blood flows to the placenta via the uterine arteries, supplying oxygen and nutrients to the fetal side of the placenta.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale
Quickening, the first movements of the fetus felt by the mother, typically occurs between 18-20 weeks gestation. At 18 weeks, it's likely the mother will feel a fluttering sensation soon.
Choice B rationale
While fetal movements can sometimes be felt later, it's generally expected that by 18-20 weeks, movements should be noticeable.
Choice C rationale
The baby does move at 18 weeks, but the mother typically begins to feel these movements at this stage, known as quickening.
Choice D rationale
Suggesting the mother should have felt movement by now could cause unnecessary anxiety. Most women feel their baby's movements between 18-20 weeks. .
Correct Answer is C
Explanation
Choice A rationale
Chromosomal defects are typically assessed using different tests, such as chorionic villus sampling or amniocentesis, rather than an ultrasound at this early stage.
Choice B rationale
Fetal lung maturity cannot be assessed at 9 weeks gestation because the lungs are not yet developed. This assessment is usually done later in pregnancy if preterm delivery is anticipated.
Choice C rationale
At 9 weeks gestation, the primary purpose of an ultrasound is to confirm the presence of a fetal heartbeat, which indicates a viable pregnancy.
Choice D rationale
The position of the fetus in utero is not a concern at this early stage of pregnancy. Fetal positioning becomes relevant later in pregnancy, closer to delivery.
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