BIOL354 Lecture Notes - Tetraodontidae, Xenobiotic, Tetrodotoxin
25 Dec 2012
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Document Summary
Toxicology: study of harmful effects in living organisms from exposure to foreign substances. Xenobiotic: abiotic foreign chemical (synthetic or naturally occurring) that may produce toxic (lead) or useful (pharmaceuticals) effects: anthropogenic: synthetic substances, not naturally occurring. Toxicants: abiotic poisonous agents (chemicals not produced by living organisms: e. g. Toxin: biotic poisonous agents (substances produced by living organisms: e. g. Hematoxin (snake venom) & tetrodotoxin[na+ channel blocker] (puffer fish) tired & irritable. Pollutants (stressors: 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.
