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The Immune System

C) The body's defense against a particular pathogen.
D) The lack of resistance.
E) None of the above.

GLOSSARY

Antibody: Antibody or (immunoglobulin) is a protein generated by the immune system (B cells)
in response to a foreign substance (antigen).

Antibody titer: A test done to check the immunity of vaccination, when identification of a low
immunity to a vaccine a booster shot can be given to increase the immunity.

Antigen: Protein (or polysaccharide) molecule that the body recognizes as nonself. Substance
body recognizes as foreign such as, fungi, viruses, protozoans, parasitic worms, pollen, poison ivy plant
resin, insect venom, and transplanted organs.

Antiseptic: Antimicrobial substance applied to living tissue or skin to prevent infection.

Apoptosis: Programmed cell death

B Cell: Lymphocytes that are responsible for antibody-mediated immunity

Basophils: WBC that release histamine and other chemicals

Chemotaxis: Movement of cells, phagocytes especially, they move in a specific direction in a
tumbling fashion like rolling this is all due to a chemical stimulant.

Complement System: Biochemical cascade of the immune system that helps clear pathogens from
an organism, and promote healing

Cytokines: Regulatory peptides that control cell development,differentiation, and the immune
response

Dendritic: cells that activate lymphocytes

Diapedesis: The movement of WBC's for the blood to the surrounding tissue. A mechanism of the
kind phagocyte that will walk or crawl out of the blood stream to site of infection.

Edema: Swelling that forms when too much tissue fluid forms or not enough taken away

Eosinophils: WBC that fight parasites and contribute to allergic reactions

Histamine: Histamine is a chemical involved in inflammation, this chemical makes capillaries
leaky, in this it will move more fluid out into the tissue spaces.

IgA: Found in breast milk, mucus, saliva, and tears. This immunoglobulin functions to stop the
pathogens before entry to the internal environment.

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