ATI RN
Immune System NCLEX Questions Quizlet Questions
Question 1 of 5
The reason for naming the closed circulatory systems
Correct Answer: C
Rationale: Closed circulatory systems are named so because blood remains confined within vessels, unlike open systems where it bathes tissues directly.
Question 2 of 5
Which of the following statements about HIV is false?
Correct Answer: B
Rationale: HIV targets helper T cells, not mast cells (involved in allergies), making B false; others are true.
Question 3 of 5
Which of the options below best completes the following statement: NK cells are of origin and target for their elimination.
Correct Answer: A
Rationale: NK cells, of lymphoid origin, target altered host cells (e.g., virus-infected or cancerous), not bacteria or antigens directly.
Question 4 of 5
Complete the following sentence. Initiation of the germinal centre reaction is mediated by the.
Correct Answer: B
Rationale: CD40 ligation by T cells activates B cells to start the germinal center reaction, key for affinity maturation.
Question 5 of 5
Mature α:β T cells:
Correct Answer: D
Rationale: Mature αβ T cells express CD3, are single-positive (CD4 or CD8), and migrate peripherally.