ATI RN
Pediatric Immunity NCLEX Questions Questions
Question 1 of 5
Pathogen-associated molecular patterns
Correct Answer: A
Rationale: PAMPs are conserved structures on various microorganisms, recognized by innate immunity.
Question 2 of 5
Regarding chemokines, which one of the following is the most accurate?
Correct Answer: C
Rationale: Chemokines, like IL-8, attract neutrophils to infection sites, aiding inflammation.
Question 3 of 5
Which of the following statements best applies to the following diagram?
Correct Answer: C
Rationale: MHC class I is expressed on all nucleated cells, including T and B cells. Answer assumed as C based on typical MHC I description.
Question 4 of 5
Which immune system cells recognize body cells with reduced expression of MHC class I molecules?
Correct Answer: D
Rationale: NK cells target cells with low MHC I, a sign of viral infection or malignancy.
Question 5 of 5
A 6-month-old presents with recurrent cellulitis and bacteremias due to Staphylococcus aureus. The white blood cell count is 2500 with 5% neutrophils, 10% eosinophils, 35% monocytes, and 50% lymphocytes. The platelet count is 650,000. A brother and a female cousin died at the age of 18 months and 2 years, respectively. The most likely diagnosis is
Correct Answer: C
Rationale: Kostmann disease (severe congenital neutropenia) fits with persistent neutropenia, recurrent Staphylococcus aureus infections, and a family history suggesting autosomal recessive inheritance.