ATI RN
Immune System NCLEX Questions Questions
Question 1 of 5
Which of the following statements about lymphatic vessels is accurate?
Correct Answer: D
Rationale: Lymphatic vessels carry lymph toward the heart, aided by muscle movement.
Question 2 of 5
Which of the following is NOT a chemical barrier that prevents infection?
Correct Answer: B
Rationale: Mucous membranes are physical, not chemical barriers.
Question 3 of 5
Identify the function of perforins.
Correct Answer: C
Rationale: Perforins from cytotoxic T cells drill holes in target membranes.
Question 4 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 5 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.