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
Click Save and Submit to save and submit. Click Save All Answers to save all answers.
.awasam-promo {
background-color: #9ED5EA;
color: white;
text-align: center;
padding: 10px;
}
.button {
background-color: #4CAF50;
border: none;
color: white;
padding: 10px 20px;
text-align: center;
text-decoration: none;
display: inline-block;
font-size: 16px;
margin: 4px 2px;
cursor: pointer;
border-radius: 10px;
}
.awasam-alert {
color: red;
}
“Get 15% discount on your first 3 orders with us” Use the following couponFIRST15
Order Now
What Students Are Saying About Us
.......... Customer ID: 12*** | Rating: ⭐⭐⭐⭐⭐"Honestly, I was afraid to send my paper to you, but splendidwritings.com proved they are a trustworthy service. My essay was done in less than a day, and I received a brilliant piece. I didn’t even believe it was my essay at first 🙂 Great job, thank you!"
.......... Customer ID: 14***| Rating: ⭐⭐⭐⭐⭐
"The company has some nice prices and good content. I ordered a term paper here and got a very good one. I'll keep ordering from this website."