Exposure Pathway: The route a substance takes from its source (where it began) to its end point (where it ends), and how people can come into contact with (or get exposed to) it. An exposure pathway has five parts: a source of contamination (such as an abandoned business); an environmental media and transport mechanism (such as movement through groundwater); a point of exposure (such as a private well); a route of exposure (eating, drinking, breathing, or touching), and a receptor population (people potentially or actually exposed). When all five parts are present, the exposure pathway is termed a completed exposure pathway.

 

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Exposure Pathway: The route a substance takes from its source (where it began) to its end point (where it ends), and how people can come into contact with (or get exposed to) it. An exposure pathway has five . . . View Full Definition

Point Of Exposure: The place where someone can come into contact with a substance present in the environment [see exposure pathway].

Metabolic Pathway: A series of individual chemical reactions in a living system that combine to perform one or more important functions. The product of one reaction in a pathway serves as the substrate for the . . . View Full Definition

Motor (Efferent) Pathways: The portion of the peripheral nervous system that carries signals from the central nervous system to the muscles and glands.