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Lecture

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Department
Biology
Course
BIOL 354
Professor
Bruce Greenberg
Semester
Summer

Description
BIOL354 Environmental Toxicology I Spring 2012 Lecture 1: Introduction - Toxicology: Study of harmful effects in living organisms from exposure to foreign substances. o Interdisciplinary (multiple facets), different levels of organization. - Xenobiotic: Abiotic foreign chemical (Synthetic or naturally occurring) that may produce toxic (lead) or useful (pharmaceuticals) effects. o Anthropogenic: Synthetic substances, not naturally occurring. - Toxicants: Abiotic poisonous agents (Chemicals not produced by living organisms) o E.g. Metals (weathering of rocks), PAHs &PCBs (synthetic) - Toxin: Biotic poisonous agents (Substances produced by +iving organisms) o E.g. Hematoxin (snake venom) & Tetrodotoxin[Na channel blocker] (Puffer fish) tired & irritable. - Pollutants (stressors) o From the molecular level to the ecosystem level:  Increasing system complexity, impacts relevance, & decreasing certainty.  Effect due to accumulation of multiple stressors @ complex organizational levels. - No Exposures = No Effects o Toxicant released, organisms exposed & takes up the toxicant (Modification?), shows responses on the organism or trans-genera
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