Chapter 14

Instructions

Choose your answers from a-d by clicking the radio button next to each choice and then press 'Submit' to get your score.

Regarding the natural immune system:

a) Neutrophils only destroy bacteria circulating in the blood.

b) Macrophages use nitrous oxide to kill bacteria they have engulfed.

c) Complement kills bacteria prior to their uptake by phagocytes.

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

Regarding the inflammatory response:

a) Tissue swelling is the first stage of the inflammatory response.

b) Mast cells secrete chemotactic agents that attract lymphocytes.

c) Macrophages secrete vasoactive materials during the inflammatory response.

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

Regarding the lymphocytes:

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

b) Lymphocytes only leave the blood at sites of inflammation.

c) B lymphocytes respond to antigens in the extracellular fluid.

d) All B lymphocytes become plasma cells after they have been stimulated.

Regarding the functions of T lymphocytes:

a) T lymphocytes mature in the thyroid gland.

b) All T cells secrete cytotoxic materials.

c) T cells respond to proteins on the surface of host cells.

d) T cells secrete IgG when they are activated.

About anitibodies:

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

b) IgM crosses the placenta and provides a fetus with antibody protection.

c) T lymphocytes secrete IgM in response to a first infection.

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