ATI RN
Pediatric Immunization NCLEX Questions Ricci Questions
Question 1 of 5
which of the following is not in LPS recognition pathway
Correct Answer: D
Rationale: CD46 regulates complement, not LPS recognition, which involves CD14, MD2, and MYD88 in the TLR4 pathway.
Question 2 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 3 of 5
Cytokines
Correct Answer: B
Rationale: Cytokines can be inhibited by soluble receptor fragments, blocking their activity.
Question 4 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 5 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.