Immune System Flashcards
Body Systems Review
infectious disease
pathogen-caused disease passed from one organism to another organism.
pathogen
agent, such as a bacterium, virus, protozoan, or fungus, that causes infectious disease.
Koch’s postulates
rules for demonstrating that an
organism causes a disease.
reservoir
source of a pathogen in the environment
endemic
found only in one geographic area
epidemic
large outbreak of a specific disease in a particular area
pandemic
widespread epidemic
antibiotic
substance that is
able to kill or inhibit the growth of some microorganisms.
complement protein
protein in blood plasma that
enhances phagocytosis.
interferon
antiviral protein secreted by virus-infected cells.
lymphocyte
white blood cell involved in specific immunity; a B cell or a T cell.
antibody
protein produced by B lymphocytes that specifically reacts with a foreign antigen.
B cell
antibody producing B lymphocyte
helper T cell
lymphocyte that activates antibody secretion in B cells and cytotoxic T cells.
cytotoxic T cell
lymphocyte that destroys pathogens and releases cytokines when activated.