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Environmental Health and Toxicity- Reverse Lesson 1 Presented by Mrs. Perryman.
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Transcript of Environmental Health and Toxicity- Reverse Lesson 1 Presented by Mrs. Perryman.
![Page 1: Environmental Health and Toxicity- Reverse Lesson 1 Presented by Mrs. Perryman.](https://reader035.fdocuments.us/reader035/viewer/2022062804/56649f165503460f94c2cf51/html5/thumbnails/1.jpg)
Environmental Health and Toxicity- Reverse Lesson 1
Presented by Mrs. Perryman
![Page 2: Environmental Health and Toxicity- Reverse Lesson 1 Presented by Mrs. Perryman.](https://reader035.fdocuments.us/reader035/viewer/2022062804/56649f165503460f94c2cf51/html5/thumbnails/2.jpg)
Antibiotic and Pesticide Wheel
![Page 3: Environmental Health and Toxicity- Reverse Lesson 1 Presented by Mrs. Perryman.](https://reader035.fdocuments.us/reader035/viewer/2022062804/56649f165503460f94c2cf51/html5/thumbnails/3.jpg)
What does this concept mean for you?
• CBS News Report on Antibiotics
![Page 4: Environmental Health and Toxicity- Reverse Lesson 1 Presented by Mrs. Perryman.](https://reader035.fdocuments.us/reader035/viewer/2022062804/56649f165503460f94c2cf51/html5/thumbnails/4.jpg)
Toxic Chemicals
Hazardous• Means dangerous
Toxins• Are poisonous
![Page 5: Environmental Health and Toxicity- Reverse Lesson 1 Presented by Mrs. Perryman.](https://reader035.fdocuments.us/reader035/viewer/2022062804/56649f165503460f94c2cf51/html5/thumbnails/5.jpg)
We will not discuss these formally but be familiar with:
• Allergens• Antigens• Neurotoxins• Mutagens• Teratogens• Fetal Alcohol Syndrome• Carcinogens
• These may appear on the AP exam. I might include them in test questions (as part of the question), so be familiar with their meaning.
![Page 6: Environmental Health and Toxicity- Reverse Lesson 1 Presented by Mrs. Perryman.](https://reader035.fdocuments.us/reader035/viewer/2022062804/56649f165503460f94c2cf51/html5/thumbnails/6.jpg)
Movement, distribution and fate of toxins
![Page 7: Environmental Health and Toxicity- Reverse Lesson 1 Presented by Mrs. Perryman.](https://reader035.fdocuments.us/reader035/viewer/2022062804/56649f165503460f94c2cf51/html5/thumbnails/7.jpg)
Bioaccumulation
• Natural process of an organism selectively absorbing and storing a great variety of molecules
• Organism could not survive with out this process
• Biomass
![Page 8: Environmental Health and Toxicity- Reverse Lesson 1 Presented by Mrs. Perryman.](https://reader035.fdocuments.us/reader035/viewer/2022062804/56649f165503460f94c2cf51/html5/thumbnails/8.jpg)
Biomagnification
• A chemical is stored in tissue and is transferred up the food chain
• Usually your oil/fat soluble toxins
![Page 9: Environmental Health and Toxicity- Reverse Lesson 1 Presented by Mrs. Perryman.](https://reader035.fdocuments.us/reader035/viewer/2022062804/56649f165503460f94c2cf51/html5/thumbnails/9.jpg)
![Page 10: Environmental Health and Toxicity- Reverse Lesson 1 Presented by Mrs. Perryman.](https://reader035.fdocuments.us/reader035/viewer/2022062804/56649f165503460f94c2cf51/html5/thumbnails/10.jpg)
Two visuals to help us with this!
http://www.youtube.com/watch?v=E5P-UoKLxlA
• How does Pacman explain Bioaccumulation and Biomagnification?
![Page 11: Environmental Health and Toxicity- Reverse Lesson 1 Presented by Mrs. Perryman.](https://reader035.fdocuments.us/reader035/viewer/2022062804/56649f165503460f94c2cf51/html5/thumbnails/11.jpg)
Persistence
• Chemical remains for a very long time
• Directly related to the structure of the molecule.
• C-Cl combinations- not found in nature so no microbes have evolved to break them down so they remain in an ecosystem
• Example:Chloroflurocarbons
![Page 12: Environmental Health and Toxicity- Reverse Lesson 1 Presented by Mrs. Perryman.](https://reader035.fdocuments.us/reader035/viewer/2022062804/56649f165503460f94c2cf51/html5/thumbnails/12.jpg)
Chemical Interactions
• Antagonistic reactions- interfere with the intended effects OR stimulate the break down of a needed molecule.
• Example: Vitamin A, D and E can reduce the response an organism has to carcinogens
• Additive- occur together in an exposure
![Page 13: Environmental Health and Toxicity- Reverse Lesson 1 Presented by Mrs. Perryman.](https://reader035.fdocuments.us/reader035/viewer/2022062804/56649f165503460f94c2cf51/html5/thumbnails/13.jpg)
Synergistic Effect
• Interactions in which one substance exacerbates the effect of another
• Example: • London's Killer Fog• Killer Fog Part 2,3, 4,5 and
6 available on Youtube. They are interesting we will discuss this in more detail Second Semester.