In toxicology, a biologic effect that is quantifiable and indicative of a toxic process.
A response measure in a toxicity study.
in toxicology, a quantifiable biological change or effect caused by a toxic process. Also refers to the point in an animal experiment when no more information can be obtained and the experiment is stopped.
An observable or measurable biological, chemical, or functional event used as an index of the effect of a chemical, physical, or biological agent on a cell, tissue, organ, organism, etc.
a characteristic of an ecological component that may be affected by exposure to a chemical
a threshold defining a hazardous condition, such as an exposure level, dose or pollutant concentration
A biological effect used as an index of the effect of a chemical on an organism.
The measure of an effect that may correlate with exposure to a chemical or drug - but there is no guaranteed relationship.
An observable or measurable biological event or chemical concentration (e.g., metabolite concentration in a target tissue) used as an index of an effect of a chemical exposure.