ATI RN
Immune System Exam Questions Questions
Question 1 of 5
Which of the following cells is involved in cell-mediated immunity?
Correct Answer: B
Rationale: T cells drive cell-mediated immunity, targeting infected cells.
Question 2 of 5
Identify the class of antibody that is formed first in a new infection.
Correct Answer: D
Rationale: IgM is the first antibody produced in a primary response.
Question 3 of 5
A special feature of adaptive immunity is:
Correct Answer: B
Rationale: Adaptive immunity uniquely distinguishes self from non-self.
Question 4 of 5
The class I major histocompatibility complex (MHC)
Correct Answer: D
Rationale: MHC I has HLA-A, B, C loci; it's on nucleated cells , chromosome 6 , and highly polymorphic .
Question 5 of 5
Which of the following cells plays a central role in the development of an immune response?
Correct Answer: D
Rationale: T-helper cells coordinate immunity; macrophages present antigens, neutrophils fight infection, and T-cytotoxic kill cells.