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the absence of homeostasis, the cause of loss of equilibrium in organism that results in illness
when a cell, organ, organism, or ecosystem is outside the "normal," healthy range, a loss of homeostasis, a loss of equilibrium
any substance than is inhaled, ingested, or absorbed at dosages high enough to damage a living organism.
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.
immunity that results when an individual receives the immune agents from some source other than his or her own body
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