ATI RN
Lymphatic System Multiple Choice Questions and Answers Questions
Question 1 of 5
The body's innate defenses against infection include
Correct Answer: B
Rationale: Innate defenses are nonspecific and include physical barriers like dead skin cells and mucus, which prevent pathogen entry, unlike antibodies or memory cells (adaptive immunity).
Question 2 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 3 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 4 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.
Question 5 of 5
Which is the major difference between CD8+ and NK cell cytotoxicity?
Correct Answer: D
Rationale: CD8+ T cells target viral antigens on MHC1, while NK cells kill nonspecifically (e.g., low MHC), both using apoptosis.