ATI RN
Immune System Questions Questions
Question 1 of 5
Concerning the paracortex of lymph node, choose the correct Statement:
Correct Answer: C
Rationale: Paracortex venules are lined with cuboidal (high) endothelium ; it's T-lymphocyte-rich, not B , and not between spleen structures or lined with plasma cells .
Question 2 of 5
What are PRRs and what do they recognize?
Correct Answer: B
Rationale: PRRs (pattern recognition receptors) recognize PAMPs and DAMPs as danger signals ; C is a subset, A and D are incorrect.
Question 3 of 5
What is the role of CD40L in T cell activation?
Correct Answer: A
Rationale: CD40L (on Th cells) prolongs DC survival ; binding , proliferation , and TCR activation are indirect or separate.
Question 4 of 5
Which immune system cell is the most abundant in the lamina propria?
Correct Answer: B
Rationale: T cells are most abundant in the lamina propria for mucosal immunity; B cells , macrophages , and neutrophils are less dominant.
Question 5 of 5
Which lymphatic area is larger in a child than an adult?
Correct Answer: C
Rationale: The thymus is larger in children, shrinking with age; spleen , nodes , and duct don't vary as significantly.