As relates to the structure and function of the placenta, the nurse should be aware that.
The placenta is able to keep out most potentially harmful substances.
As one of its early functions, the placenta acts as an endocrine gland.
As the placenta widens, it gradually thins to allow easier passage of air and nutrients.
Optimal blood circulation is achieved through the placenta during pregnancy.
The Correct Answer is B
Choice A rationale
Although the placenta acts as a partial barrier, it does not keep out all harmful substances, allowing some to cross and affect fetal development.
Choice B rationale
One of the placenta's early functions is producing hormones like human chorionic gonadotropin (hCG), estrogen, and progesterone, making it act as an endocrine gland.
Choice C rationale
The placenta does not thin out; it remains robust and increases in thickness to support the growing fetus and facilitate nutrient and gas exchange.
Choice D rationale
While optimal blood circulation through the placenta is crucial, this statement lacks detail on the specific structural and functional aspects of the placenta.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale
Valsalva maneuver involves forced expiration against a closed airway, increasing intrathoracic pressure and used to aid in expelling the fetus during labor.
Choice B rationale
Ferguson’s reflex involves the release of oxytocin due to vaginal and cervical stretching, resulting in stronger contractions during the second stage of labor.
Choice C rationale
Lightening refers to the descent of the fetus into the pelvis before labor, relieving pressure on the diaphragm and easing breathing.
Choice D rationale
Molding is the slight overlapping of cranial bones, allowing the fetal head to shape and fit through the birth canal during labor.
Correct Answer is C
Explanation
Choice A rationale
Paceritation is a term not commonly recognized in obstetrics. It lacks clinical relevance and does not correlate with increased risk during labor when membranes rupture.
Choice B rationale
Shoulder dystocia occurs during delivery when the baby's shoulder gets stuck after the head is delivered. It is unrelated to ruptured membranes and does not increase the associated risk.
Choice C rationale
Infection risk increases significantly after membranes rupture due to potential bacterial entry into the uterine cavity. Normal WBC count is 4,000-11,000 cells/mcL.
Choice D rationale
Meconium aspiration occurs when the newborn inhales meconium-stained amniotic fluid, typically in post-term pregnancies or fetal distress. It is not directly linked to ruptured membranes.
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