which of the following is not in LPS recognition pathway

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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.

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