Which statement about fetal circulation is true?
Fetal circulation is no longer effective at birth.
Fetal circulation continues until red blood cells are broken down.
Fetal circulation continues until after the stress of labor.
Fetal circulation continues until adulthood.
The Correct Answer is C
Fetal circulation continues until after the stress of labor.
Choice A rationale:
Fetal circulation undergoes significant changes at birth. It becomes ineffective as the transition from intrauterine to extrauterine life occurs. The foramen ovale and ductus arteriosus, which allow blood to bypass certain fetal circulatory pathways, close as the baby breathes for the first time.
Choice B rationale:
Fetal circulation does not continue until red blood cells are broken down. Red blood cells in a fetus have a shorter lifespan than those in adults and are continually replaced throughout gestation. However, their breakdown is not the reason for the changes in fetal circulation.
Choice C rationale:
The correct answer. Fetal circulation continues until after the stress of labor. During labor, the baby experiences increased stress and pressure, which helps trigger various physiological changes, including the closure of specific fetal circulatory shunts.
Choice D rationale:
Fetal circulation does not continue until adulthood. As mentioned earlier, the transition from fetal to adult circulation occurs during and after birth, with the closure of specific fetal shunts and the establishment of a fully functional adult circulatory system.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. This is not a primary consideration before bathing a newborn. The timing of the last feeding is more relevant to assessing the risk of hypoglycemia rather than determining readiness for a bath.
B. This temperature is slightly below the recommended range for newborns (36.5°C to 37.5°C). Bathing should be delayed until the newborn's temperature is stable.
C. While care of the umbilical cord is important, it does not determine the timing of the first bath. The cord can be kept dry even if the baby is bathed.
D. Ensuring that the newborn has maintained a stable body temperature for at least 2 hours is crucial before giving the first bath. Bathing can cause a drop in body temperature, so it's essential that the newborn's thermoregulation is stable to avoid hypothermia.
Correct Answer is ["C","E"]
Explanation
Choice A rationale:
Washing the penis with warm water and mild soap each day is not an appropriate statement regarding circumcision care with a Plastibell device. Keeping the area clean is essential, but soap may irritate the wound, and frequent washing can disrupt the healing process.
Choice B rationale:
Ensuring a loose diaper in the front is not directly related to circumcision care with a Plastibell device. It may be relevant for comfort, but it does not address specific care for the circumcision site.
Choice C rationale:
This is a correct statement indicating understanding of circumcision care with the Plastibell device. The plastic ring is expected to fall off on its own within a week, and this is a normal part of the healing process.
Choice D rationale:
Applying petroleum jelly to the penis during diaper changes is not recommended for circumcision care with a Plastibell device. The petroleum jelly can interfere with wound healing and should be avoided.
Choice E rationale:
This is also a correct statement indicating understanding of circumcision care. If bleeding occurs after the Plastibell has fallen off, it could be a sign of a complication, and the doctor should be notified promptly.
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