ATI RN
Lymphatic System Multiple Choice Questions and Answers Questions
Question 1 of 5
The experiment shown in Figure Q6.19 uses two strains of mice that differ in their MHC genes. Strain A is H-2^a and Strain B is H-2^b. Mice of each strain are infected with the virus LCMV, and T cells are isolated at day 8 post-infection. These T cells are mixed with target cells that express either H-2^a or H-2^b; in each case, the target cells are either uninfected or infected with LCMV. The explanation for the results of this experiment is:
Correct Answer: D
Rationale: T cells are MHC-restricted; strain A T cells recognize H-2^a ; both strains respond (A, B), H-2^b cells are infected .
Question 2 of 5
When a B cell first interacts with its particular antigen, the B cell
Correct Answer: C
Rationale: B cells, upon antigen binding, differentiate into plasma cells that produce antibodies, not dying, engulfing, or altering antigens.
Question 3 of 5
Where is the antigen-binding site of this antibody?
Correct Answer: A
Rationale: The antigen-binding site is at site A (assumed figure), located at the variable regions of the antibody's arms.
Question 4 of 5
Complete this sentence. Mature dendritic cells.
Correct Answer: C
Rationale: Mature DCs form dendrites to present antigens to T cells, unlike immature DCs (uptake) or granulocytes (not primary targets).
Question 5 of 5
In addition to CD40 ligation, which of the statements below identify a cytokine that induce a correct antibody isotype?
Correct Answer: B
Rationale: IL-4/IL-13 drive IgE switching (allergy), while IFNγ (IgG) and TGFβ (IgA) induce other isotypes.