ATI RN
Immune System NCLEX Questions Quizlet Questions
Question 1 of 5
Complete the following sentence. Initiation of the germinal centre reaction is mediated by the.
Correct Answer: B
Rationale: CD40 ligation by T cells activates B cells to start the germinal center reaction, key for affinity maturation.
Question 2 of 5
Monoclonal antibodies are routinely used in all of the following EXCEPT
Correct Answer: D
Rationale: Monoclonal antibodies aid leukemia , pathogen , and tumor studies; manipulation is less routine.
Question 3 of 5
Which disease would be most similar to AIDS in its pathology?
Correct Answer: A
Rationale: SCID mimics AIDS with broad T/B cell loss; others (B, C, D) are narrower defects.
Question 4 of 5
Complement fixation is one of the most crucial host defenses against infections. The complement is activated by;
Correct Answer: C
Rationale: IgM and IgG activate complement; not IgM only or all classes .
Question 5 of 5
Which of these does NOT act as a protecting barrier for the body surface?
Correct Answer: C
Rationale: Salivary amylase digests, not protects; mucus , skin , and acid are barriers.