Correct Answer: B

Rationale: Neuromaturational theory emphasizes that motor development progresses in a predictable sequence and rate, starting from primitive reflexes to voluntary control. It also states that low-level skills are foundational for higher-level skills. However, the theory does not support the idea that movement solely emerges from an interaction and cooperation of many systems, as it focuses more on the hierarchical development of motor skills.

Correct Answer: B

Rationale: A sodium level of 140 mEq/L within the expected reference range indicates effective treatment for dehydration. In dehydration, sodium levels are often elevated, so a normal sodium level suggests that the treatment is helping to restore the electrolyte balance in the infant's body.

Correct Answer: A

Rationale: Cyclosporine is used to suppress the immune system and prevent rejection of the transplanted kidney. It helps to reduce the risk of the body attacking and rejecting the new organ. This medication is crucial in ensuring the success of the kidney transplant by keeping the immune system in check.

Correct Answer: D

Rationale: After a tonsillectomy, applying an ice collar to the child's neck helps decrease pain and swelling. Heat should be avoided as it can increase bleeding. Encouraging coughing may increase the risk of bleeding. Administering analgesics on a regular schedule is essential for pain management, but the immediate postoperative period may require additional interventions like ice collar application.

Correct Answer: C

Rationale: To calculate the correct dosage, first convert the infant's weight to kilograms: 17.6 lb = 8 kg. The prescribed dose is 5 mg/kg, so for an 8 kg infant, the total dose required is 40 mg. Since the available ibuprofen liquid is 100 mg/5 ml, to find out how many milliliters to administer, divide the total dose (40 mg) by the concentration of the liquid (100 mg/5 ml), which equals 2 ml. Therefore, the healthcare provider should administer 2 ml of ibuprofen to the infant.