Assignment: Environment Local To Global

Assignment: Environment Local To Global
Assignment: Environment Local To Global
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Assignment: Environmental Health: Local To Global
Question 1
In environmental health, the term toxin refers to a toxic substance that _______________.
[removed] is naturally produced by a plant or animal
[removed] occurs in the occupational setting
[removed] results from human activity
[removed] a man-made product introduced into the environment due to human activity
1 points
Question 2
In toxicity testing in rodents, the LD50 is a dose that is _______________.
[removed] acutely fatal to 50 percent of test animals
[removed] fatal to 50 percent of test animals within a 90-day period
[removed] fatal to 50 percent of test animals after lifetime bioaccumulation
1 points
Question 3
Which of the following is not characteristic of a health impact assessment?
[removed] It evaluates a site or activity as it is, rather than looking forward in time
[removed] It includes social and economic factors in the assessment
[removed] It incorporates input from community members
1 points
Question 4
An exposure pathway connects _______________ to _______________.
[removed] an exposure / a change in tissue structure or function
[removed] inhalation / absorption
[removed] the environmental source of a contaminant / the point of exposure
1 points
Question 5
The three major routes of human exposure to environmental contaminants are _______________.
[removed] by air, water, and soil
[removed] environmental, occupational, and residential
[removed] ingestion, inhalation, and dermal contact
1 points
Question 6
The phrase contact with the human envelope is a common definition of _______________.
[removed] absorption
[removed] disposition
[removed] exposure
1 points
Question 7
The quantity of a toxicant (or its breakdown product) that is available to interact with some vulnerable tissue in the body is called the _______________.
[removed] absorbed dose
[removed] biologically effective dose
[removed] body burden
1 points
Question 8
The body burden of a chemical in the body reflects the net effect of _______________.
[removed] absorption and biological effectiveness
[removed] synergism and antagonism
[removed] the processes of toxicokinetics
1 points
Question 9
Bioaccumulation is the _______________.
[removed] gradual building up of a chemical in the tissue of an organism
[removed] increase of concentrations of a chemical at higher levels of a food pyramid
[removed] movement of a chemical from water to living tissue
1 points
Question 10
Which of the following is an example of a biomarker?
[removed] Body mass index calculated from measured height and weight
[removed] Concentration of a pesticide in blood
[removed] Inhalation rate in liters per hour
1 points
Question 11
The Ames test is a test of a chemical’s _______________.
[removed] acute lethality, and is conducted in rodents
[removed] mutagenicity, and is conducted in bacteria
[removed] teratogenic potential, and is conducted mammalian cells
1 points
Question 12
Exposure modeling is used to estimate the _______________.
[removed] biologically effective dose of a toxicant
[removed] fate and transport of a toxicant
[removed] ingestion of, inhalation of, or dermal contact with a toxicant
1 points
Question 13
Conceptually, a reference dose is a dose that has no adverse effects in _______________.
[removed] sensitive subpopulations over a long-term exposure
[removed] sensitive subpopulations over a short-term exposure
[removed] the general population over a long-term exposure
[removed] the general population over a short-term exposure
1 points
Question 14
Which of the following is one of the major processes which together make up toxicokinetics?
[removed] Bioconcentration
[removed] Distribution
[removed] Mutation
[removed] Synergism
1 points
Question 15
In doing a risk assessment for a chemical, the usual assumption is that _______________.
[removed] carcinogenicity has a threshold; non-cancer effects do not
[removed] non-cancer effects have a threshold; carcinogenicity does not
[removed] both carcinogenicity and non-cancer effects have thresholds
[removed] neither carcinogenicity nor non-cancer effects has a threshold
1 points

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