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Related Flashcards
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Cards In This Set
| Front | Back |
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Toxics are
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Substances that are harmful to human health and the environment, even in low doses
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Most toxics come from
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Most come from industrial and agricultural activities
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Mutagens
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cause mutations in DNA. Eg. Sodium azide
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Teratogens
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cause birth defects in embryos- Eg, mercury
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CARCINOGENS:
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cause/promote growth of malignant tumor in which
cells multiply uncontrollably. Eg. Benzene and asbestos
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Bioaccumulation
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- increase
in concentration of a chemical in organs/tissues at a higher level then would
be normal.
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Biomagnification
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- Levels
of toxics become magnified as they travel through the trophic levels of the
food chain. Ex. DDT &PCB
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Hazard
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cause injury or death.
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Physical Hazard
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o tsunami,
erosion, storm surge, surf rips
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Chemical Hazard
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pesticides, cleaning chemicals
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Biological Hazard
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Bugs, worms
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TOXICITY:
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- ability
of a substance to produce a harmful or lethal effect on humans or other
organisms
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TRI: Toxic Release Inventory-
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- report
releases of chem.,
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- LEAD:
Pb
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o Naturally
occurring
o Colorless/odorless
o Used
in batteries, paint
o Pb
accumulation can lead to brain and kidney damagePlumbism
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CHROMIUM: Cr
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o Hard/bluish
o Used
as an alloy to make steel harder/tanning
of leather
o Exposure
through breathing, skin contact, eating
o Most
dangerous form is toxic in low concentrations- CR IV
o Chromium
to chromate: number(amount of chro)
multiplied by 0.448
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