When does the posterior fontanelle close?
3 to 6 months.
6 to 9 months.
9 to 12 months.
2 to 3 months.
The Correct Answer is D
The correct answer is D. 2 to 3 months.
Choice A rationale:
The posterior fontanelle does not close within 3 to 6 months of birth. This timeframe is too long for the typical closure of the posterior fontanelle.
Choice B rationale:
Similarly, the posterior fontanelle does not close within 6 to 9 months of birth. This period is beyond the usual closure time for the posterior fontanelle.
Choice C rationale:
The posterior fontanelle does not close within 9 to 12 months of birth. This timeframe is significantly longer than the typical closure period for the posterior fontanelle.
Choice D rationale:
The posterior fontanelle typically closes within 2 to 3 months of birth. This is the correct timeframe for the closure of the posterior fontanelle.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale:
The lower central incisors are the first deciduous (baby) teeth to erupt in most infants. They typically appear around 6-10 months of age. Explaining that the lower central incisors are the first to come in is accurate and aligns with typical dental development.
Choice B rationale:
Upper lateral incisors are not the first deciduous teeth to erupt. While they do come in after the central incisors, they are not the first teeth to appear in most cases.
Choice C rationale:
Upper central incisors come in after the lower central incisors but before the upper lateral incisors. They are not the first deciduous teeth to erupt, so this choice is not accurate in the context of the question.
Choice D rationale:
Lower lateral incisors are not the first deciduous teeth to erupt. They come in later, after the central incisors. This choice is not accurate with respect to the question about the first teeth to erupt.
Correct Answer is C
Explanation
Choice A rationale:
Allowing the child to read in his room until he falls asleep may not be the most appropriate choice in this situation. While reading can be a calming bedtime activity, it might not address the underlying issue of establishing a consistent bedtime routine. Additionally, letting a child read until they fall asleep could lead to irregular sleep patterns.
Choice B rationale:
Tiring out the child with physical activity before bedtime might seem like a good idea to promote sleep, but it's not always effective for all children. Physical activity close to bedtime may have the opposite effect, making the child more alert and active. It's essential to focus on a combination of calming activities and a consistent bedtime routine.
Choice D rationale:
Allowing the child to put himself to bed when he is tired can lead to inconsistent sleep patterns and may not be suitable for a young child. Children thrive on routine and structure, and it's important to establish a bedtime routine that provides a sense of security and predictability. Allowing a child to decide when to go to bed can disrupt this routine.
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