EESA10H3 Lecture Notes - Lecture 9: Worst-Case Scenario Series, Chronic Toxicity, Median Lethal Dose

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Contaminants and hazards, bad risk assessments done on all hazards like physical, cultural, etc. Toxicology: assessing chem. (1) chemical partitioned b/w: - water, soil, air, our bodies dissociation: anions diff than cations. Water soluble : organic chemicals, heavy metals, Bioaccumulation: accumulation of some toxicant in organ of an ind. Multiple chemicals-> hard to detect only 1 chem usually exposed to mixture of chemicals. Antagons: in presence of carcinogen it can reduce effect ex. If 2 chemicals found together that effect will be even worse ex. Asbestos ->carcinogen-> and if person is smoker and exposed to asbestos chances of getting lung cancer is even greater. Gen health-> is there any chronic illnesses / has poor health can suffer more. Gen makeup-> parents transfer things to us and some are more naturally resistant they are worst case scenarios. Toxicology: dose inhaled thru lungs skin contact (dermal contact is mostly industrial chemicals )

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