ATI RN
Immune System Practice Questions Questions
Question 1 of 5
Cardiac output
Correct Answer: D
Rationale: Cardiac output is defined as the volume of blood pumped by the heart per minute into the systemic circulation.
Question 2 of 5
Which of the following types of cells does HIV preferentially infect?
Correct Answer: C
Rationale: HIV infects helper T cells via CD4 receptors, disrupting immune regulation, not cytotoxic T, NK, or memory cells primarily.
Question 3 of 5
Which of the options below best completes the following statement: Perforin is a protein secreted by NK cells which.
Correct Answer: C
Rationale: Perforin forms pores in target cell membranes, allowing granzymes to enter and induce lysis, not related to C9 or MHC detection.
Question 4 of 5
Complete the following sentence. Proliferation and differentiation of B cells can be enhanced by thymus independent antigens including......
Correct Answer: D
Rationale: TLR-PAMP and C3d-CD21 interactions enhance TI antigen responses, not C5d (not a complement opsonin).
Question 5 of 5
The expression of γ:δ T cell receptor results in lymphocytes with 'innate like' features, an example of which is that these cells:
Correct Answer: C
Rationale: γδ T cells have innate-like effector roles (e.g., cytokine production), recognizing non-MHC ligands.