ATI RN
Immune System Practice Questions Questions
Question 1 of 5
Complete the following sentence. Proliferation and differentiation of B cells can be enhanced by thymus independent antigens including......
Correct Answer: D
Rationale: TLR-PAMP and C3d-CD21 interactions enhance TI antigen responses, not C5d (not a complement opsonin).
Question 2 of 5
Which of the following DOES NOT play a role in antigen presentation?
Correct Answer: C
Rationale: MHC I and II present antigens; MHC III includes complement genes, not presentation.
Question 3 of 5
Human immunodeficiency virus (HIV) binds specifically to which immune cell marker?
Correct Answer: D
Rationale: HIV targets CD4 on T-helper cells; not CD8 , MHC , or others (C, E).
Question 4 of 5
Which type of antibody is MOST effective in activating complement?
Correct Answer: D
Rationale: IgM is most effective due to pentameric structure; IgG3 is strong but less so.
Question 5 of 5
Which of the following cells is involved in humoral immunity??
Correct Answer: D
Rationale: B-cells produce antibodies for humoral immunity; T cells are cell-mediated.