Identify the specific defense cell that destroys v

ATI RN

ATI RN Test Bank

Identify the specific defense cell that destroys virus-infected cells and cancerous cells.

A. B lymphocytes B. Cytotoxic T cells C. Helper T cells D. NK cells

Correct Answer: B

Rationale: Cytotoxic T cells target infected/cancerous cells.

Complement membrane attack complex can be activated by

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

Correct Answer: D

Rationale: IgG and IgM activate complement; IgE , IgA , and IgD don't.

Which of the following can be an antigen presenting cell through MHC Class II:

A. Bacterial B. Macrophage C. Neutrophils D. Red blood cells

Correct Answer: B

Rationale: Macrophages present via MHC II; bacteria are antigens, neutrophils and RBCs don't present, T-cells receive.

Based upon the above information, which component of the immune system would you expect to be abnormal?

A. T cells B. B cells C. Complement D. Neutrophils

Correct Answer: A

Rationale: T cells fight chronic viral infections; B cells , complement , neutrophils , and eosinophils are less likely.

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