ATI RN
NCLEX Pediatric Musculoskeletal Questions Questions
Question 1 of 5
The mechanism of hypokalemia in emesis is mainly due to
Correct Answer: B
Rationale: Vomiting causes loss of HCl, leading to metabolic alkalosis, which drives potassium into cells and increases renal potassium loss.
Question 2 of 5
Very-low birth weight infants can have insensible losses of
Correct Answer: D
Rationale: Very-low birth weight infants have high insensible losses (100-200 mL/kg/day) due to immature skin.
Question 3 of 5
The characteristic features of Duchenne muscular dystrophy (DMD) are progressive weakness, intellectual impairment, hypertrophy of the calves, and proliferation of connective tissue in muscle. Of the following, the BEST initial test for diagnosis is
Correct Answer: D
Rationale: Serum creatine kinase (CK) is the best initial test for DMD due to its significant elevation (10-100 times normal) early in the disease, reflecting muscle damage.
Question 4 of 5
In spinal muscular atrophy (SMA) type 1, all the following are spared EXCEPT
Correct Answer: B
Rationale: In SMA type 1 (Werdnig-Hoffmann), the diaphragm is often affected, leading to respiratory failure, while the heart, intelligence, and sphincters are typically spared.
Question 5 of 5
The best diagnostic test in Guillain-Barré syndrome (GBS) is
Correct Answer: A
Rationale: CSF study showing albuminocytologic dissociation (high protein, normal cell count) is the best diagnostic test for GBS.