Which of the following statements accurately describes a characteristic of the newborn immune system?
Newborns are born with fully developed immune responses capable of independently fighting infections from birth.
Newborns have a mature gut microbiome that supports their immune system immediately after birth.
Newborns rely solely on their innate immune system without any contribution from maternal antibodies.
Newborns receive passive immunity through the placenta and colostrum, but their own immune system is not fully functional until several months of age.
The Correct Answer is D
Choice A rationale
Newborns are not born with fully developed immune responses. Their immune system is immature and continues to develop after birth. They rely on maternal antibodies for initial protection.
Choice B rationale
Newborns do not have a mature gut microbiome immediately after birth. The gut microbiome develops over time and is influenced by factors such as breastfeeding and exposure to the environment.
Choice C rationale
Newborns do not rely solely on their innate immune system. They receive passive immunity from maternal antibodies transferred through the placenta and colostrum, which provides initial protection against infections.
Choice D rationale
Newborns receive passive immunity through the placenta and colostrum, but their own immune system is not fully functional until several months of age. This passive immunity helps protect them from infections during the early months of life.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale
A newborn with a temperature of 37.0°C (98.6°F) is within the normal range for newborns and does not require immediate intervention.
Choice B rationale
A newborn who has not voided within 27 hours post-delivery requires immediate intervention. Newborns should void within the first 24 hours of life. Failure to void may indicate dehydration, urinary tract obstruction, or renal issues.
Choice C rationale
A newborn who has not passed meconium within 18 hours post-delivery is concerning but not as urgent as not voiding. Newborns typically pass meconium within the first 24-48 hours.
Choice D rationale
Acrocyanosis, or bluish discoloration of the hands and feet, is common in newborns and usually resolves on its own. It does not require immediate intervention.
Correct Answer is C
Explanation
Choice A rationale
Faint red marks on the plantar surface are more common in preterm infants and are not typically seen in post-term infants.
Choice B rationale
Copious vernix is usually seen in preterm infants. Post-term infants often have little to no vernix.
Choice C rationale
Dry, cracked skin is a common finding in post-term infants due to prolonged exposure to the amniotic fluid.
Choice D rationale
Scant scalp hair is more common in preterm infants. Post-term infants usually have more developed hair.
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