Assignment:Environmental Health

Assignment:Environmental Health

Assignment:Environmental Health

Assignment:Environmental Health

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Question 1

In environmental health, the term toxin refers to a toxic substance that _______________.
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is naturally produced by a plant or animal
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occurs in the occupational setting
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results from human activity
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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 _______________.
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acutely fatal to 50 percent of test animals
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fatal to 50 percent of test animals within a 90-day period
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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?
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It evaluates a site or activity as it is, rather than looking forward in time
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It includes social and economic factors in the assessment
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It incorporates input from community members
1 points

Question 4

An exposure pathway connects _______________ to _______________.
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an exposure / a change in tissue structure or function
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inhalation / absorption
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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 _______________.
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by air, water, and soil
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environmental, occupational, and residential
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ingestion, inhalation, and dermal contact
1 points

Question 6

The phrase contact with the human envelope is a common definition of _______________.
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absorption
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disposition
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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 _______________.
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absorbed dose
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biologically effective dose
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body burden
1 points

Question 8

The body burden of a chemical in the body reflects the net effect of _______________.
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absorption and biological effectiveness
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synergism and antagonism
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the processes of toxicokinetics
1 points

Question 9

Bioaccumulation is the _______________.
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gradual building up of a chemical in the tissue of an organism
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increase of concentrations of a chemical at higher levels of a food pyramid
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movement of a chemical from water to living tissue
1 points

Question 10

Which of the following is an example of a biomarker?
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Body mass index calculated from measured height and weight
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Concentration of a pesticide in blood
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Inhalation rate in liters per hour
1 points

Question 11

The Ames test is a test of a chemical’s _______________.
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acute lethality, and is conducted in rodents
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mutagenicity, and is conducted in bacteria
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teratogenic potential, and is conducted mammalian cells
1 points

Question 12

Exposure modeling is used to estimate the _______________.
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biologically effective dose of a toxicant
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fate and transport of a toxicant
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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 _______________.
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sensitive subpopulations over a long-term exposure
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sensitive subpopulations over a short-term exposure
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the general population over a long-term exposure
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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?
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Bioconcentration
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Distribution
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Mutation
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Synergism
1 points

Question 15

In doing a risk assessment for a chemical, the usual assumption is that _______________.
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carcinogenicity has a threshold; non-cancer effects do not
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non-cancer effects have a threshold; carcinogenicity does not
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both carcinogenicity and non-cancer effects have thresholds
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neither carcinogenicity nor non-cancer effects has a threshold
1 points

You must proofread your paper. But do not strictly rely on your computer’s spell-checker and grammar-checker; failure to do so indicates a lack of effort on your part and you can expect your grade to suffer accordingly. Papers with numerous misspelled words and grammatical mistakes will be penalized. Read over your paper – in silence and then aloud – before handing it in and make corrections as necessary. Often it is advantageous to have a friend proofread your paper for obvious errors. Handwritten corrections are preferable to uncorrected mistakes.
Use a standard 10 to 12 point (10 to 12 characters per inch) typeface. Smaller or compressed type and papers with small margins or single-spacing are hard to read. It is better to let your essay run over the recommended number of pages than to try to compress it into fewer pages.

Likewise, large type, large margins, large indentations, triple-spacing, increased leading (space between lines), increased kerning (space between letters), and any other such attempts at “padding” to increase the length of a paper are unacceptable, wasteful of trees, and will not fool your professor.

The paper must be neatly formatted, double-spaced with a one-inch margin on the top, bottom, and sides of each page. When submitting hard copy, be sure to use white paper and print out using dark ink. If it is hard to read your essay, it will also be hard to follow your argument.

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