ATI RN
Lymphatic and Immune System Test Questions Questions
Question 1 of 5
Regarding Hassall's corpuscles, one of the following is true:
Correct Answer: C
Rationale: Hassall's corpuscles increase with age ; they're in medulla , surrounded by reticular cells not lymphocytes , and are acidophilic .
Question 2 of 5
What are TCRs?
Correct Answer: B
Rationale: TCRs (T-cell receptors) are on T cells ; B cells have BCRs, not TCRs.
Question 3 of 5
What is activation-induced cell death (AICD)?
Correct Answer: B
Rationale: AICD removes overstimulated T cells ; it's not for proliferation , cytokine production , or B7 affinity .
Question 4 of 5
Which of the following molecules is not generally produced by T cells and macrophages?
Correct Answer: D
Rationale: Tissue thromboplastin is a clotting factor, not from T cells/macrophages; growth factors , cytokines , and CSFs are immune-related.
Question 5 of 5
Secondary (or peripheral) lymphoid organs are sites for initiation of adaptive immune responses. Given the rarity of lymphocytes specific for any given antigen and the vast amount of body tissue that must be protected, the system of secondary lymphoid tissues is efficient because:
Correct Answer: A
Rationale: Secondary lymphoid organs concentrate antigens for rare lymphocytes; proliferation follows, trapping or innate clearance are less primary.