ATI RN
Immune System Multiple Choice Questions and Answers PDF Questions
Question 1 of 5
Hepatitis C is a virus that infects hepatocytes, which are non-immune cells of the liver. Currently, patients with chronic Hepatitis C infections are treated with repeated administration of type I interferon, predominantly interferon α. One aspect of this treatment that might aid the patient's immune system in clearing this virus infection is:
Correct Answer: A
Rationale: Type I interferon boosts MHC I on hepatocytes , aiding CD8 T cells; macrophage action or inflammation are less direct.
Question 2 of 5
A molecule that can elicit an adaptive immune response is called
Correct Answer: D
Rationale: An antigen triggers adaptive immunity by being recognized by lymphocytes, unlike complement (innate), interferon (antiviral), or antibodies (response products).
Question 3 of 5
After binding to an infected cell, the cytotoxic T cell
Correct Answer: D
Rationale: Cytotoxic T cells release perforin to lyse infected cells, not interleukin-1, phagocytosis, or neutralization.
Question 4 of 5
Which is the least abundant granulocyte in peripheral blood?
Correct Answer: A
Rationale: Basophils are the least abundant granulocytes in blood (<1%), unlike neutrophils (most abundant) or eosinophils; mast cells reside in tissues.
Question 5 of 5
What is the difference between the recombination of heavy and light chain variable regions?
Correct Answer: B
Rationale: Heavy chains use V, D, and J segments, while light chains use V and J only; both require RAG1/2.