ATI RN
Pediatric Immunization NCLEX Questions Ricci Questions
Question 1 of 5
At what stage of B cell development are auto-reactive cells removed?
Correct Answer: D
Rationale: Auto-reactive B cells are removed during the immature cell stage via negative selection.
Question 2 of 5
Where does a mature T cell encounter antigen for the first time?
Correct Answer: D
Rationale: Mature T cells encounter antigens on APCs in secondary lymphoid organs like lymph nodes.
Question 3 of 5
Activation of the gene for IL-2, and eventually TH proliferation, is caused by a critical signal (along with TCR signal transduction) from ___ on the B cell and ___ on the T cell.
Correct Answer: D
Rationale: CD80 (B cell) and CD28 (T cell) provide the costimulatory signal for IL-2 production and T-helper proliferation.
Question 4 of 5
Which of the following is NOT true regarding apoptosis of target cells?
Correct Answer: C
Rationale: bcl genes are anti-apoptotic, promoting cell survival, not shortening it.
Question 5 of 5
Migrate and present antigen to T cells
Correct Answer: A
Rationale: Langerhans cells in the skin migrate to present antigens to T cells.