A threshold dose-response model
A. implies there is a dose below which no detectable harmful effects occur.
B. errs on the side of safety.
C. implies that each dose of a harmful substance carries a risk of causing harm.
D. is useful for assessing chronic toxicity.
E. assumes chemicals vary widely in their toxicity.
Answer: A
You might also like to view...
The percentage of a material's volume that is pore space is called:
a. permeability b. porosity c. transmissivity d. storage
A decrease in stream power can cause all of the following except
A) channel deepening. B) a delta. C) an alluvial fan. D) migrating shorelines.
Why use the term invironment instead of environment?
a) Environment is the broader category; the invironment is the zone of the body’s interactions with the environment. b) Invironment extends beyond you and me; environment is immediate. c) Environment is the natural world, invironment is the built landscape. d) Invironment is the domestic sphere, environment includes public health.
A cross section of the ocean from its surface to the seafloor shows
A. less dense, warmer water overlying denser, colder water. B. more dense, warm water overlying less dense, colder water. C. more dense, warmer water overlying denser, colder water. D. less dense, colder water overlying less dense, warmer water.