| Term | Definition |
|---|
| Cell mediated immunity (CMI) | A type of immunity involving the T cells, which directly attack and kill a foreign invader; can attack parasites and viruses, reject foreign tissues (transplants), and attack certain cancer cells |
| Helper T cells | Formed as a result of the proliferation of T cells during an immunes respones to help other T cells perform tasks |
| Killer T cells | Specialized cells formed from T cells that directly attack and kill invaders using toxins |
| Suppressor T cells | T cells that slow down the immune response when conditions normalize |
| Memory T cells | Produced and remain in lymphatic tissue indefinitely for future protection from same invaders |
| Antibody mediated immunity (AMI) | Performed by B cells; binds to anitgens; become activated; differentiate into one of two cells - plasma cells and memory B cells |
| Plasma cells | Produce many antibodies that attack bacteria that are dissolved in blood |
| Memory B cells | B cells that remain in the tisses for life |
| Antibodies | Belong to immunoglobulin (IG) class of microproteins; have 4 polypeptide chains - 2 longer identical heavy chains, and 2 indentical (shorter) light chains |
| Function of antibodies | Binds to antigens and prevent it from entering and causing harm; enhances other defense mechanisms |
| IgG | Most abundant antibody in blood; neutralizes bacteria and enhances phagocytosis; only antibody passed from mother to fetus |
| IgA | Antibody found in most body secretions; sweat, mucus, etc; provides protection to specific region produced |
| IgM | First anitbody produced |
| IgD | Antibody located on the surface of B cells; function is unknown |
| IgE | Anitibody found on the surface of basophils and mast cells; involved in allergic responses |
Combine with other sets
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