ATI RN
Immune System Multiple Choice Questions and Answers PDF Questions
Question 1 of 5
is a gaseous by-product of natural gas combustion plant hormone
Correct Answer: C
Rationale: Ethylene is a gaseous plant hormone, sometimes linked to combustion byproducts, while auxin and gibberellins are not gaseous.
Question 2 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 3 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 4 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.
Question 5 of 5
A naïve lymphocyte is:
Correct Answer: C
Rationale: Naïve lymphocytes are mature, antigen-unexposed cells ready for activation.