Correct Answer: D

Rationale: Hypocalcemia can lead to neuromuscular irritability, causing symptoms such as muscle cramps, tetany, or seizures. Other symptoms like nausea, vomiting, and weakness are less specific and can be related to various conditions.

Correct Answer: B

Rationale: Pain management should be based on the child's report of pain, regardless of their activity level. Administering the prescribed analgesic is the appropriate action. Reassessing the child in 15 minutes without providing immediate pain relief may not be in the child's best interest. Doing nothing since the child appears to be resting may lead to inadequate pain management. Asking the child's parents if they think the child is hurting does not replace the need for direct assessment and intervention by the nurse.

Correct Answer: C

Rationale: Offering medical equipment to play with prior to a procedure is developmentally appropriate when caring for a hospitalized school-age child. Allowing the child to familiarize themselves with the equipment helps reduce fear and anxiety about the upcoming procedure. Choices A, B, and D are not as appropriate for a school-age child. Providing brochures regarding sexuality is not developmentally appropriate for this age group. Giving clear instructions about treatment details may overwhelm a child of this age. Using toys for distraction during a painful procedure is more suitable for younger children.

Correct Answer: D

Rationale: Both metabolic and respiratory alkalosis can cause overexcitability and nervous system stimulation due to a decrease in ionized calcium levels, which can cause symptoms such as tetany and paresthesias. Acidosis typically has the opposite effect, leading to depression of the nervous system.

Correct Answer: A

Rationale: The correct answer is A: 1 year. By the age of 1 year, a baby's birth weight typically triples. This period allows for significant growth and development in infants. Choices B, C, and D are incorrect because birth weight does not usually triple by 1 month, 2 years, or 6 months of age, respectively.