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27 terms

immune system and disease

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germ theory
theory that states that diseases are caused by microscopic particles called pathogens
pathogen
agent that causes disease
vector
organism, such as a mosquito or tick, that transfers pathogens from one host to another
immune system
body system that fights off infections
phagocyte
cell that destroys other cells by surrounding and engulfing them
T cell
white blood cell that matures in the thymus and destroying infected body cells by causing them to burst; also called a T-lymphocyte
B cell
white blood cell that matures in the bone marrow and produce antibodies that fight off infection; also called B-lymphocyte
antibody
protein produced by B cells that aids in the destructio of pathogens
interferon
type of protein, produced by body cells, that prevents viruses from replicating in infected cells
passive immunity
immunity that occurs without the body undergoing an immune response
active immunity
immunity that occurs after the body responds to an anitgen
inflammation
immune response that is characterized by swelling, redness, pain, and itching
antigen
protein marker that helps the immune system identify foreign particles
memory cell
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cellular immunity
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humoral immunity
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tissue rejection
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antiseptic
chemical, such as soap, vinegar, or rubbing alcohol, that destroys pathogens outside the body
anitbiotic resistance
process by which bacteria mutate so that they are no longer affected by an antibiotic
vaccine
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allergy
immune response that occurs when the body responds to a nondisease-causing antigen, such as pollen or animal dander
allergen
antigen that does not cause disease but still produces an immune response
anaphylaxis
severe allegic reaction that causes airways to tighten and blood vessels to leak
leukemia
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oppurtunistic infection
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human immunodeficiency virus (HIV)
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acquired immune deficiency syndrome (AIDS)
condition characterized by having several infections and very few T-cells; caused by HIV