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environmental scienc

Environmental diseases test 1-22-15

Miasma Theory of Disease poisonous vapor or mist filled with particles from decomposed matter
What replaced the Miasma Theory of Disease Germ Theory of Disease
Germ Theory of Disease microorganisms that are too small to see without magnification
Why were bloodletting and water cure not affective? they didn't address the actual cause of the disease
non-transmissible disease not contagious; EX: cancer, heart disease
Example of a Large parasite tapeworm
Example of fungi athletes foot
Example of protozoa malaria
Example of bacteria food poisoning
Example of viruses AIDS
Example of prion mad cow disease
emergent disease something that resurfaces or is completely new
Why is a completely new disease bad? 1. you don't have a built up resistance 2. don't have medications
What was the problem with spraying of the DDT trying to control malaria? it created a fog that was toxic to all people and animals
Why are bacteria able to evolve resistance more quickly than other organisms? their small size and fast reproductivity
carcinogens chemicals that cause cancer; EX: tobacco smoke
teratogens chemicals that cause birth defects in an unborn fetas; EX: drinking
hormone mimics have similar affects to hormones
hormone blockers prevents natural hormones from attaching to their target organ
how is the plastic additive BPA classified? endocrine disruptor
how are you exposed to BPA? plastics
"Any synthetic or natural chemical has the potential to cause harm.... ....if the level of exposure is high enough."
Which type of solubility is more likely to lead to the accumulation of a toxin in the body? Why? oil soluble because they live in the fat stores in your body
What is an example of an acceptable risk with a high probability of exposure? Why is this risk acceptable? Mercury in seafood; it is acceptable because while there is a high risk of exposure, the affects are not severe
Why would someone be biased to risk assessment? 1. biased media 2. Misunderstandings 3. personal experience
What level of a food chain is most likely to bioaccumulate a persistent toxin? top level, as substances pass up the food chain it accumulates at high, more toxic levels
If the number is higher, is it more or less lethal? if the number is higher, it is less lethal
If the number is lower, is it more or less lethal? if the number is lower, it is more lethal - it takes less to kill people
Created by: a.allsup