Exam 15: The Immune System

Actions of interferons include

What is the ability to mount a specific immune response called?

Mutations in complement proteins 1 through 4 directly affect the structure of the membrane attack complex.

Interferons

Mutations in polypeptides called _____________ that are produced by T cells would prevent T cells from destroying infected cells.

What chemical is released by neutrophils that produces pus at the site of an infection?

Autoimmune diseases include

The characteristic symptoms of local inflammation include redness,warmth,swelling,pain,and pus.

Which of the following is NOT a secondary lymphoid organ?

Interactions between B cells and helper T cells stimulate the actions of killer T cells.

Mutation in the variable regions of the heavy and light chains would directly change the antigen binding site.

Helper T lymphocytes interact specifically with antigens presented with class-2 MHC molecules.

Phagocytotic leukocytes involved in the inflammatory response generally do not reenter system circulation.

Benign tumors grow rapidly and can be dispersed throughout the body.

Which is true of immediate hypersensitivity reactions?

The ability of IgM antibodies to convert of other types of antibodies is called

Once a B lymphocyte has been activated to an antigen,it travels to a secondary lymphoid organ and forms a ______ where cloning occurs.

Antibodies act as "red flags" to identify antigens or pathogenic organisms for phagocytosis or action by complement.