ATI RN
Immune System Exam Questions Questions
Question 1 of 5
The inflammatory response produced
Correct Answer: B
Rationale: The inflammatory response is primarily triggered by tissue injury, not specifically microbial infection or erythrocyte migration, though infection can lead to injury.
Question 2 of 5
When an antigen-presenting cell interacts successfully with a helper T cell, the antigen-presenting cell secretes a signal molecule that assists in the activation of the helper T cell. This signal molecule is
Correct Answer: C
Rationale: Interleukin-1 from antigen-presenting cells (e.g., macrophages) activates helper T cells, unlike interferon, complement, or perforin (cytotoxic T cell product).
Question 3 of 5
Which of the following statements best describes the classical complement pathway effector function?
Correct Answer: D
Rationale: The classical pathway, triggered by antibodies, promotes inflammation, lysis (via MAC), and opsonization (via C3b), making all options correct.
Question 4 of 5
Which of the statements below correctly describes Bcells and plasma cells?
Correct Answer: D
Rationale: Plasma cells are B cell derivatives that secrete antibodies, with large cytoplasm and ER, unlike naïve B cells.
Question 5 of 5
CD8 co-receptors:
Correct Answer: C
Rationale: CD8+ T cells (~35%) interact with MHC1, not MHCII; CD4 marks helper T cells.