ATI RN
Pediatric Immunization NCLEX Questions Ricci Questions
Question 1 of 5
Which immune cell is responsible for the quickest release of histamine that causes the red itchy welts associated with allergies?
Correct Answer: A
Rationale: Mast cells rapidly release histamine in allergic responses, causing welts.
Question 2 of 5
In the classical pathway, after the proteolysis of C3 complement pathway, which component is cleaved by C4bC2aC3b and initiate the formation of membrane attack complex
Correct Answer: A
Rationale: C5 is cleaved by C5 convertase (C4b2a3b) to initiate MAC formation.
Question 3 of 5
A workup on an ill child revealed low levels of complement C3 in her blood. Which one of the following presentations did this child most likely manifest?
Correct Answer: D
Rationale: C3 deficiency impairs opsonization and complement activation, increasing susceptibility to extracellular bacterial infections.
Question 4 of 5
19-year-old college student develops a rash. She works part-time in a pediatric AIDS clinic. Her blood is drawn and tested for specific antibody to the chicken pox virus (varicella-zoster). Which of the following antibody classes would you expect to find if she is immune to chicken pox?
Correct Answer: A
Rationale: IgG indicates long-term immunity to past infections like chickenpox.
Question 5 of 5
Antigen presenting cells (APCs) are required for T-cell recognition of specific antigen and activation. APCs accomplish this task by presenting antigen in the context of which of the following molecules?
Correct Answer: C
Rationale: APCs present antigens on MHC molecules to T cells.