ATI RN
Pediatric Musculoskeletal Disorders Questions
Question 1 of 5
Duchenne muscular dystrophy (DMD) is the most common hereditary neuromuscular disease affecting all races and ethnic groups. All the following are features of DMD EXCEPT
Correct Answer: C
Rationale: Fasciculation is not a feature of DMD, which is characterized by progressive muscle weakness, scoliosis, contractures, cardiomyopathy, and intellectual impairment. Fasciculations are more typical of neurogenic conditions like ALS.
Question 2 of 5
Guillain Barré syndrome is an autoimmune disorder often considered a postinfectious polyneuropathy involving mainly motor but also sensory and sometimes autonomic nerves. All the following are required in diagnosis EXCEPT
Correct Answer: B
Rationale: Muscle biopsy is not required for GBS diagnosis; CSF (elevated protein), EMG, and nerve studies are more relevant.
Question 3 of 5
Myasthenia gravis should be differentiated from other causes of neuromuscular blockade as organophosphate chemicals, botulism, and tick paralysis. Of the following, the MOST specific diagnostic test is
Correct Answer: C
Rationale: Anti-acetylcholine receptor (AChR) antibodies are the most specific diagnostic test for myasthenia gravis, present in 85-90% of cases.
Question 4 of 5
Enhancers of nonheme iron absorption are
Correct Answer: A
Rationale: Ascorbic acid (vitamin C) is explicitly listed as an enhancer of nonheme iron absorption in the text, making A the primary correct choice.
Question 5 of 5
Volume depletion without renal insufficiency may cause a disproportionate increase in the BUN, with little or no change in the creatinine concentration. This increase in the BUN may be absent or blunted in a child with
Correct Answer: C
Rationale: Poor protein intake reduces urea production, blunting BUN elevation, as BUN reflects protein metabolism.