In a newborn infant, which of the following is the liver's job related to bilirubin?
Changing conjugated bilirubin to unconjugated.
Synthesis of vitamin K.
Changing unconjugated bilirubin to conjugated bilirubin.
Removal of meconium.
The Correct Answer is C
Choice A rationale:
The liver's job related to bilirubin is not changing conjugated bilirubin to unconjugated. Conjugated bilirubin is the water-soluble form of bilirubin that is excreted in bile and urine. Unconjugated bilirubin, on the other hand, is the fat-soluble form, which is transported to the liver and conjugated to become water-soluble. The conversion goes from unconjugated to conjugated, not the other way around.
Choice B rationale:
The liver's job related to bilirubin is not the synthesis of vitamin K. The liver is responsible for synthesizing clotting factors, including factors II (prothrombin), VII, IX, and X, but not vitamin K itself. Vitamin K is obtained from dietary sources or supplements and is essential for blood clotting.
Choice C rationale:
This choice is the correct answer. The liver's primary function related to bilirubin is changing unconjugated bilirubin to conjugated bilirubin. As mentioned earlier, unconjugated bilirubin is produced from the breakdown of heme in old red blood cells, and it needs to be processed in the liver to become water-soluble and eventually excreted in bile and urine.
Choice D rationale:
The liver's job related to bilirubin does not involve the removal of meconium. Meconium is the first stool passed by a newborn, and its elimination is unrelated to the liver's function in processing bilirubin.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","C","D","F"]
Explanation
Choice A rationale:
The newborn reflex called "rooting”. is characterized by turning the head and opening the mouth when the cheek or mouth area is touched. This reflex helps the newborn find the mother's breast for feeding.
Choice B rationale:
"Stepping”. is a newborn reflex where they make stepping movements when held upright with their feet touching a solid surface. This reflex is present at birth but tends to disappear after a few weeks.
Choice C rationale:
The "Moro”. reflex is also known as the startle reflex. It is elicited by a sudden loss of support or loud noise, causing the newborn to throw their arms and legs out and then bring them back in. This reflex usually disappears around 3 to 4 months of age.
Choice D rationale:
The "Babinski”. reflex is characterized by the extension of the big toe and fanning of the other toes when the sole of the foot is stroked. This reflex is present in newborns and should disappear by around 12 months of age.
Choice E rationale:
"Running”. is not a recognized newborn reflex. There is no reflex with this name related to newborns.
Choice F rationale:
The "gag”. reflex is present in newborns and helps protect the airway by causing a gagging response when the back of the throat is stimulated.
Correct Answer is C
Explanation
Choice A rationale:
A respiratory rate of 22/min would be abnormally low for a newborn. The expected reference range for newborns is around 30-60 breaths per minute.
Choice B rationale:
A respiratory rate of 100/min would be abnormally high for a newborn. Such a high respiratory rate may indicate respiratory distress or other underlying issues and requires further evaluation.
Choice C rationale:
A respiratory rate of 48/min falls within the expected reference range for a newborn, which is around 30-60 breaths per minute. This rate suggests that the newborn's respiratory system is functioning within the normal range.
Choice D rationale:
A respiratory rate of 110/min would be abnormally high for a newborn. As mentioned earlier, the expected reference range for newborns is around 30-60 breaths per minute, making this rate concerning and necessitating further assessment.
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