Which of the following is not an acute phase prote

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ATI RN Test Bank

Which of the following is not an acute phase protein:

A. Chondroitin sulfate B. C-reactive protein C. Fibrinogen D. Mannose binding lectin

Correct Answer: A

Rationale: Chondroitin sulfate is a structural molecule, not an acute phase protein like CRP or fibrinogen.

Cytotoxic T cells are called into action by the:

A. presence of interleukin-1 B. presence of interleukin-2 C. presence of neutrophils D. decrease in the number of B cells

Correct Answer: B

Rationale: IL-2 activates cytotoxic T cells; IL-1 is broader, neutrophils are innate.

Which of the following does not occur during the lag period of the primary antibody response?

A. activation of helper T cells B. class switching to IgG C. presentation of antigen with MHC II D. binding of antigen to BCRs

Correct Answer: B

Rationale: Class switching occurs later; activation , presentation , and binding happen in lag.

The ability of T-lymphocytes to recognize self from non-self antigens is developed in the

A. plasma cells B. spleen C. thymus D. liver

Correct Answer: C

Rationale: T cells gain self/non-self recognition during maturation in the thymus via positive and negative selection.

In an autoimmune disease, the immune response is directed toward

A. foreign antigens B. self-antigens C. antibodies D. viruses

Correct Answer: B

Rationale: Autoimmune diseases target self-antigens, causing immune attack on host tissues.

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