ATI RN
Immune System NCLEX Questions Questions
Question 1 of 5
Interferons are
Correct Answer: A
Rationale: Interferons are cytokines that inhibit viral replication.
Question 2 of 5
Identify the function of perforins.
Correct Answer: C
Rationale: Perforins from cytotoxic T cells drill holes in target membranes.
Question 3 of 5
Cytotoxic T cells can be activated via which of the following?
Correct Answer: C
Rationale: Cytotoxic T cells (CD8+) are activated by viral peptides on MHC-I.
Question 4 of 5
An example of secondary mediators released by Mast cells would be
Correct Answer: B
Rationale: PAF is a secondary mediator; histamine , heparin , and chymase are primary.
Question 5 of 5
Lysis of cells by complement is finalized by the formation of:
Correct Answer: C
Rationale: Membrane Attack Complex lyses cells; C1q starts classical, immune complexes trigger, and properdin stabilizes alternative.