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the absence of homeostasis, the cause of loss of equilibrium in organism that results in illness
the organism that a nourishes and supports a parasite
when a cell, organ, organism, or ecosystem is outside the "normal," healthy range, a loss of homeostasis, a loss of equilibrium
collection of organs that fight and promote resistance to disease
resistance to disease
invasions by pathogens
an organism that lives on or in a host and causes it harm
a disease causing organism
the characteristic of being able to cause a disease
having the ability to damage an organism
any substance than is inhaled, ingested, or absorbed at dosages high enough to damage a living organism.
injection of a weakened or mild form of a pathogen to produce immunity
loss of homeostasis caused by a virus
a strand of hereditary material surrounded by a protein coating, needs a host so it can replicate
The name of the late stages of HIV infection; defined by a specific reduction of T cells and the appearance of characteristic secondary infections.
white blood cell
a blood cell that fights disease
immune reactions to normally harmless substances
compound that blocks the growth and reproduction of bacteria
foreign substances that stimulate the production of antibodies.
single-celled organisms that lack a nucleus; prokaryotes
identification of a disease, identifying the nature or cause of some phenomenon
immunity produced by exposure to an antigen, as a result of the immune response
immunity that results when an individual receives the immune agents from some source other than his or her own body
a protein made by white blood cells that act against a specific antigen