Physician Assistant Pediatric 3

Question 1

A 7-year-old boy has been struggling in school, is frequently out of his seat, and interrupts others. Symptoms are present at home and school. What is the first-line pharmacotherapy?

Accepted Answer

Methylphenidate

Answer

Stimulant medications such as methylphenidate are first-line pharmacotherapy for ADHD in school-age children.

Question 2

A 9-month-old is brought in for failure to thrive. Weight is below the 3rd percentile. The child is alert, interactive, and has no dysmorphic features. What is the most common cause?

Accepted Answer

Inadequate caloric intake

Answer

The most common cause of failure to thrive in infancy is inadequate caloric intake, whether from feeding difficulties, improper formula preparation, or psychosocial issues.

Question 3

A 14-year-old female presents with primary amenorrhea, short stature, webbed neck, and a wide carrying angle. What is the most likely karyotype?

Accepted Answer

45,X

Answer

Turner syndrome (45,X) presents with primary amenorrhea, short stature, webbed neck, and increased carrying angle (cubitus valgus).

Question 4

A 3-year-old has a 2-day history of bloody diarrhea after attending a petting zoo. Labs show microangiopathic hemolytic anemia, thrombocytopenia, and elevated creatinine. What organism is responsible?

Accepted Answer

Shiga toxin-producing E. coli (STEC)

Answer

Hemolytic uremic syndrome (HUS) in children is most commonly caused by Shiga toxin-producing E. coli O157:H7, often acquired from contaminated food or animal contact.

Question 5

Which developmental milestone is expected by 12 months of age?

Accepted Answer

Walks independently

Answer

Walking independently is a gross motor milestone typically achieved between 9–15 months, with 12 months as the average.

Physician Assistant Practice Test

Physician Assistant Practice Test

Physician Assistant Pediatric 3