Cytotoxic T cells are called into action by the

ATI RN

ATI RN Test Bank

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.

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.

The lymphocytes which can develop immunocompetence in the thymus is

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

Correct Answer: B

Rationale: T lymphocytes mature and gain immunocompetence in the thymus.

The primary function of lymphatic capillaries is to:

A. Transport oxygen to cells B. Absorb excess interstitial fluid and proteins C. Produce insulin D. Transport carbon dioxide away from cells

Correct Answer: B

Rationale: Lymphatic capillaries absorb excess fluid and proteins from tissues.

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