Which of the following DOES NOT play a role in ant

ATI RN

ATI RN Test Bank

Which of the following DOES NOT play a role in antigen presentation?

A. MHC class I molecules B. MHC class II molecules C. MHC class III molecules D. None of the above

Correct Answer: C

Rationale: MHC I and II present antigens; MHC III includes complement genes, not presentation.

Which type of antibody is MOST effective in activating complement?

A. IgG1 B. IgG2 C. IgG3 D. IgM

Correct Answer: D

Rationale: IgM is most effective due to pentameric structure; IgG3 is strong but less so.

Which of the following cells is involved in humoral immunity??

A. Both T and B cells B. Mast cells C. T-cells D. B-cells

Correct Answer: D

Rationale: B-cells produce antibodies for humoral immunity; T cells are cell-mediated.

Specific immunity can be acquired either naturally or artificially and involves

A. All of the below B. antibodies C. antigens D. the classical complement pathway

Correct Answer: A

Rationale: Specific immunity (adaptive) involves antigens (trigger), antibodies (response), and complement pathways, making all options relevant.

Examples of pathogens that cause human disease include:

A. bacteria B. viruses C. fungi D. all the above

Correct Answer: D

Rationale: All of the above are examples of pathogens that cause human disease, including bacteria, viruses, fungi, and parasites.

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