ES2 Midterm IIChapter 8—Environmental Health

ES2 Midterm IIChapter 8—Environmental...

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Chapter 8—Environmental Health, Pollution, and Toxicology 1) Case Study —Demasculinization and Feminization of Frogs in the Environment a. Frogs that are exposed to the weed killer, atrazine often display gonadal abnormalities. b. The weed killer is dumped into bodies of water around the natural habitat of frogs, and the frogs are particularly vulnerable to be affected during their metamorphoses from tadpole to frog c. Such substances that interact with the hormone system of an organism is known as hormonally active agents or HAA’s d. This story brings attention to the detrimental effects human chemicals have on the environment. 2) Basic Terminology a. Disease is often due to a poor balance or adjustment between the individual and the environment i. Incidence of disease is dependent on other factors including physical environment, biological environment, and lifestyle b. Humans are not the only contributors of natural toxins into the environment i. i.e. Volcanoes produce potentially toxic sulfur dioxide, Radon Gas, Carbon Dioxide (Lake Nyos), Asbestos in Water, Wildfires c. Pollution—an unwanted change in the environment caused by introducing harmful materials or producing harmful conditions d. Contamination—implies making something unfit for a particular use though the introduction of undesirable materials e. Toxin—is a substance that is poisonous to people and other living things, Toxicology is the study of chemicals that are or could potentially be toxic
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ES2 Midterm IIChapter 8—Environmental...

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