Self-test questions: Chapter 26

. Which of the following statements regarding the natural immune system is correct?

Neutrophils can only destroy bacteria circulating in the blood.

Macrophages use nitrous oxide to kill bacteria they have engulfed.

Complement kills bacteria prior to their uptake by phagocytes.

The monocytes of the blood are the precursors of tissue macrophages.

. Which of the following statements regarding the inflammatory response is correct?

Tissue swelling is the first stage of the inflammatory response.

Mast cells secrete chemotactic agents that attract lymphocytes

Macrophages secrete vasoactive materials during the inflammatory response

The inflammatory response can be triggered by antibody binding to the surface of micro-organisms.

. Which of the following statements regarding the lymphocytes is correct?

The lymphocytes are the most abundant white cells of the blood.

Lymphocytes normally migrate through the tissues as part of immune surveillance

B lymphocytes respond to antigens in the extracellular fluid

All B lymphocytes become plasma cells after they have been stimulated

. Which of the following statements regarding the functions of T lymphocytes is correct?

T lymphocytes mature in the thyroid gland

All T cells secrete cytotoxic materials

T cells respond to foreign proteins on the surface of host cells

T cells secrete IgG when they are activated

. Natural killer (NK) cells only destroy cells infected with a virus.

True

False

. Which of the following statements about antibodies is correct?

The antigen receptor on a lymphocyte has the same specificity as the antibody it secretes

IgM crosses the placenta and provides a fetus with antibody protection

B lymphocytes secrete IgM in response to a first infection

Antibody molecules have two identical antigen binding sites in the Fc region

. The inflammatory response can be triggered by complement binding to the surface of micro-organisms.

True

False

. B lymphocytes mature in the bone marrow

True

False

. B lymphocytes secrete IgA into the plasma when they are first activated

True

False

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