ATI RN
Ricci Maternity and Pediatrics NCLEX Question Immunization Questions
Question 1 of 5
Which one of the following cells is the source of TNF-α IL-1, IL-12 ?
Correct Answer: B
Rationale: Macrophages produce TNF-α, IL-1, and IL-12 as key inflammatory cytokines.
Question 2 of 5
Neutrophils are attracted to the sites of extracellular bacterial infections by which two important chemotactic substances?
Correct Answer: B
Rationale: C5a and IL-8 (CXCL8) are potent neutrophil chemoattractants during bacterial infections.
Question 3 of 5
A cell expressing CD3pos, CD25 pos, is a:
Correct Answer: D
Rationale: CD3+CD25+ cells are typically regulatory T cells (Tregs), expressing FoxP3.
Question 4 of 5
Which of the following describes the hematopoietic centers in Gestation?
Correct Answer: A
Rationale: Hematopoiesis shifts from blood islands (yolk sac) to liver, then bone marrow during gestation.
Question 5 of 5
A 3-year-old boy presented with recurrent attacks of pneumonia and otitis media since the 1st birthday. Your diagnosis is X-linked agammaglobulinemia. Of the following, the MOST likely offending organism is
Correct Answer: D
Rationale: X-linked agammaglobulinemia (Bruton's) impairs antibody production, making encapsulated bacteria like Streptococcus pneumoniae a common cause of infections like pneumonia and otitis media.