Plasma cells are formed by?

ATI RN

ATI RN Test Bank

A. T lymphocytes B. B lymphocytes C. A lymphocytes D. None of these

Correct Answer: B

Rationale: B lymphocytes differentiate into plasma cells; T cells don't.

Which of the following is the major immunoglobulin in human serum, accounting for 80% of the immunoglobulin pool?

A. IgA B. IgD C. IgG D. IgM

Correct Answer: C

Rationale: IgG is the most abundant immunoglobulin in serum (~80%), key for systemic immunity.

Which of the following statements are correct?

A. Macrophages are granulocytes B. Macrophages derive from monocytes C. Macrophages are non-phagocytic D. Macrophages reside in the tissues

Correct Answer: B

Rationale: Macrophages derive from monocytes and reside in tissues as phagocytic cells, not granulocytes.

Helper T cells and inducer T cells are also called ___________ cells because of the coreceptor they both have.

A. CD4+ T B. CD8+ T C. CD16+ T D. CD12+ T

Correct Answer: A

Rationale: Helper and inducer T cells are CD4+ ; CD8+ are cytotoxic.

MHC II molecules present

A. processed self-antigens from proteasomes B. processed foreign antigens from phagolysosomes C. antibodies D. T cell receptors

Correct Answer: B

Rationale: MHC II presents phagolysosomal antigens; proteasomes are MHC I.

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