A parent asks the nurse why the newborn is getting a vitamin K injection in the birth room.
The nurse explains that the injection is necessary because:
Newborns are prone to hypoglycemia, and vitamin K helps maintain a steady blood glucose level.
Vitamin K is needed for coagulation, and the newborn does not produce enough vitamin K.
The birthing parent was febrile at the time of birth and prophylactic vitamin K is necessary.
Newborns have deficient levels of prothrombin.
The Correct Answer is B
Choice A rationale
Vitamin K has no role in stabilizing blood glucose levels; hypoglycemia in newborns is managed differently.
Choice B rationale
Vitamin K is essential for blood clotting, and newborns typically have low stores at birth, necessitating supplementation to prevent bleeding disorders.
Choice C rationale
There is no established link between maternal fever and the need for vitamin K; prophylaxis is standard for all newborns regardless of maternal health.
Choice D rationale
Newborns do not have sufficient prothrombin or other clotting factors, which is why vitamin K administration is critical.
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View Related questions
Correct Answer is B
Explanation
Choice A rationale
A pincer grasp, using the thumb and index finger to pick up small objects, typically develops around 9 to 12 months of age, not at 4 months.
Choice B rationale
The posterior fontanel typically closes by the age of 2 to 3 months, so a 4-month-old infant would be expected to have a closed posterior fontanel. This finding is consistent with normal development.
Choice C rationale
Lateral incisors, the teeth on either side of the front teeth, typically erupt around 9 to 13 months of age, not at 4 months.
Choice D rationale
Sitting steadily without support generally occurs closer to 6 to 8 months of age, so it would not be expected in a 4-month-old infant.
Correct Answer is A
Explanation
Choice A rationale
Proximodistal development refers to growth from the center of the body outward to the extremities. An infant grabbing with their whole hand (palmar grasp) before developing a
pincer grasp demonstrates this pattern, as they gain control of arm movements before fine motor skills in the fingers.
Choice B rationale
Cephalocaudal development refers to growth from head to toe, such as gaining control over head and neck muscles before the limbs. This does not directly explain the grasping
behavior described.
Choice C rationale
Distoproximal is not a recognized term in developmental science and does not describe a growth pattern.
Choice D rationale
Top-to-bottom is another way of describing cephalocaudal development but does not specifically address the described behavior in grasping development. .