ATI RN
Questions on the Immune System Questions
Question 1 of 5
The lymphatic vessels contain valves that help maintain the one-way flow of lymph. What is the purpose of these valves?
Correct Answer: A
Rationale: Valves ensure lymph flows toward the heart, preventing backflow.
Question 2 of 5
In order to react to pathogens and remove worn-out red blood cells, the spleen has an abundance of:
Correct Answer: B
Rationale: Lymphocytes and macrophages in the spleen handle pathogens and cell removal.
Question 3 of 5
Identify the class of antibody found in saliva and breast milk.
Correct Answer: A
Rationale: IgA protects mucosal surfaces like saliva and milk.
Question 4 of 5
An exaggerated immune response to substances that do not ordinarily harm the body is a(n):
Correct Answer: A
Rationale: Allergies are exaggerated responses to harmless substances.
Question 5 of 5
Natural killer cells
Correct Answer: C
Rationale: NK cells kill without sensitization; they are leukocytes , innate , and produce cytokines .