ATI RN
Pediatric Immunization Test Questions Questions
Question 1 of 5
Which of the following provides antiviral state to cells
Correct Answer: D
Rationale: Interferon-gamma (INF-γ) induces an antiviral state by enhancing MHC expression and activating immune cells against viral infections.
Question 2 of 5
Wrong about Macrophages
Correct Answer: B
Rationale: Macrophages present antigens to activate T cells but are less efficient than dendritic cells for naïve T cell activation.
Question 3 of 5
The difference between tolerance and immunity depends upon the maturation status of the antigen presenting dendritic cells. What is the T-cell outcome of an antigen presentation event by a mature dendritic cell?
Correct Answer: C
Rationale: Mature dendritic cells activate T cells by presenting antigens with co-stimulatory signals.
Question 4 of 5
Activation of the complement system directly causes?
Correct Answer: A
Rationale: Complement activation leads to opsonization, enhancing phagocytosis.
Question 5 of 5
A cell found in the circulation that secretes INF α and INF β is a
Correct Answer: D
Rationale: Plasmacytoid dendritic cells produce large amounts of IFN-α and IFN-β in response to viral infections.