HTH 352 Chapter Notes - Chapter 7: Exposure Assessment, Carbon Paper, Pyrography
Document Summary
Toxicant: a chemical that provokes an adverse systemic effect on living organisms: they have the ability to cause harm to organs or biochemical processes away from the site of the body where exposure occurred. Poison: referring to a chemical that can cause illness or death at a very low dose of exposure. Dose-time relationship: the amount of chemical in question and the duration of exposure. Acute toxicity: the ability to cause harm as a result of one-time exposure to a relatively large amount of the substance. Chronic toxicity: a (cid:272)he(cid:373)i(cid:272)al"s a(cid:271)ilit(cid:455) to i(cid:373)pair health (cid:449)he(cid:374) repeated lo(cid:449) dose e(cid:454)posure to the chemical occurs over a long period of time. Route of exposure: dermal, respiratory, and oral. Toxicity is influences by these exposure factors: route, duration, frequency, amount. Dose response curve: the greater dose of the toxicant, the greater the effect: threshold: where increasing dosage is beginning to provoke adverse symptoms. Not every toxicant can cause adverse symptoms.
