Exam 24: A: Immune System

Phagocytosis is the "first line of defense" in nonspecific immunity.

Because of the random nature of antibody protein synthesis,it is possible to have an "anti-self" B cell.

Plasma cells can secrete as many as 2000 antibodies per minute.

To prevent accidental harm to the body,complement can only be activated by antibodies.

Heat,redness,swelling,and pain are characteristic signs of inflammation.

One of the antigen-specific sites on the antibody is used to activate the compliment cascade in the blood.

Contact points between immune cells are sometimes called immunological synapses.

There are three types of interferon: leukocyte,fibroblast,and immune.

Aspirin is effective in lowering fever because it inhibits the growth of the disease-causing organisms.

The first vaccination provided immunity against the chickenpox virus.

T cells react mainly to antigens that are dissolved in plasma.

Each light chain in an antibody molecule contains a constant region that consists of 446 amino acids.

The chemical messengers that T cells release into inflamed tissues are called lymphotoxins.

There are almost 100 billion lymphocytes in the body's immune system.

T cell immune mechanisms are classified as antibody-mediated immunity.

Complement is a chemical produced by cells after they become infected by a virus.

Suppressor T cells function by inhibiting T cell formation.

Tobacco mosaic virus can destroy tobacco plants.It has no effect on humans.This is an example of species resistance.

Macrophages are a group of lymphocytes that kill many types of tumor cells and cells infected by different kinds of viruses.

Inherited immunity and acquired immunity are forms of specific immunity.