TOX*2000 Principles of Toxicology TEST 2 COMPLETE REVIEW
2025 University of Guelph
Your answers
, - fish pop'n affected by human pollution (pulp mill effluents, dams)
- spruce budworm introduced and treated with DDT
- Atlantic salmon at high sensitivity life stage during the spray periods of DDT
- biomagnification, pollution and PCBs
1) Level of protection may be viewed as under
protective and thus socially unacceptable
2) Particularly if the 1-10% of potentially affected species include
those of recreational, ecological, or economic
importance
3) Approach does not work well for bio accumulative substances
- energy flow and nutrient cycling
- primary production
- consumption of biomass
- providing food to predators
- decomposition
- mercury in fertilizers (Hg used as catalyst)
- waste from factories dumped untreated into bay
- Hg methylated can bioaccumulate/biomagnify through food chain
- Hg methylated from: some in factory, most in sediments
- 143 deaths
- some animals affected: cats
Don't know?
2 of 106
Term
,why would fish such as fat head minnows be problematic in interpreting responses in
a 12000-liter microcosm?
Give this one a try later!
small size and minimal food needs would their presence would enhance the stability of
not affect results the ecosystem
they are not relevant to the large size and food
microcosm's ecosystem requirements would have
significant effects on the other organism
populations (which they would eat,
leading to
anomalous results)
Don't know?
3 of 106
Term
Minamata disease
Give this one a try later!
uptake of a chemical from all sources chemical pollution due to
mercury and fish consumption in great
lakes (mercury and PCBs)
, mercury when methylated can be loss of bird populations in great lakes (DDT), colony
bioaccumulated and biomagnified collapse disorder (neonicotinoid)
through the food chain.
Don't know?
4 of 106
Term
surrogates:
Give this one a try later!
sub-discipline that focuses on the effects of chemicals on populations and communities
the distribution of the population may not overlap or only partially overlap to toxicant
a surrogate is used to test for toxicity and then extrapolate to what info is desired
designed to assess potency of substance by measuring effects on living organisms exposure conditions:
- flowthrough (best)
- static renewal
- static (poor)
2025 University of Guelph
Your answers
, - fish pop'n affected by human pollution (pulp mill effluents, dams)
- spruce budworm introduced and treated with DDT
- Atlantic salmon at high sensitivity life stage during the spray periods of DDT
- biomagnification, pollution and PCBs
1) Level of protection may be viewed as under
protective and thus socially unacceptable
2) Particularly if the 1-10% of potentially affected species include
those of recreational, ecological, or economic
importance
3) Approach does not work well for bio accumulative substances
- energy flow and nutrient cycling
- primary production
- consumption of biomass
- providing food to predators
- decomposition
- mercury in fertilizers (Hg used as catalyst)
- waste from factories dumped untreated into bay
- Hg methylated can bioaccumulate/biomagnify through food chain
- Hg methylated from: some in factory, most in sediments
- 143 deaths
- some animals affected: cats
Don't know?
2 of 106
Term
,why would fish such as fat head minnows be problematic in interpreting responses in
a 12000-liter microcosm?
Give this one a try later!
small size and minimal food needs would their presence would enhance the stability of
not affect results the ecosystem
they are not relevant to the large size and food
microcosm's ecosystem requirements would have
significant effects on the other organism
populations (which they would eat,
leading to
anomalous results)
Don't know?
3 of 106
Term
Minamata disease
Give this one a try later!
uptake of a chemical from all sources chemical pollution due to
mercury and fish consumption in great
lakes (mercury and PCBs)
, mercury when methylated can be loss of bird populations in great lakes (DDT), colony
bioaccumulated and biomagnified collapse disorder (neonicotinoid)
through the food chain.
Don't know?
4 of 106
Term
surrogates:
Give this one a try later!
sub-discipline that focuses on the effects of chemicals on populations and communities
the distribution of the population may not overlap or only partially overlap to toxicant
a surrogate is used to test for toxicity and then extrapolate to what info is desired
designed to assess potency of substance by measuring effects on living organisms exposure conditions:
- flowthrough (best)
- static renewal
- static (poor)
