ATI RN
Immune System Multiple Choice Questions and Answers PDF Questions
Question 1 of 4
Which of the following is NOT true of T cell activation?
Correct Answer: C
Rationale: T cells do not produce antibodies (B cell role); they produce cytokines.
Question 2 of 4
Examples of primary mediators released by Mast cells would be
Correct Answer: D
Rationale: Heparin is a preformed primary mediator; cytokines , leukotrienes , and PAF are secondary.
Question 3 of 4
The sum of the attractive and repulsive forces of all antibodies binding to an antigen is:
Correct Answer: A
Rationale: Affinity is binding strength; avidity is total strength, cross-reactivity is nonspecific binding, and non-reactivity is lack of binding.
Question 4 of 4
Lymphocytes that are CD4+CD25+FoxP3+ with respect to cell surface markers are called:
Correct Answer: D
Rationale: T regulatory cells are CD4+CD25+FoxP3+; not APCs , B cells , cytotoxic , or NK-like .