If a chemical is in high concentration in the sediment of a lake and a fish spends most of its time residing in the water column, then the bioavailability is high.

The concentration of a xenobiotic compound present in a medium is the ________.

You have two toxicants. Toxicant A has a VD of 1 L/kg. Toxicant B has a VD of 25 L/kg. Where are you more likely to find toxicant A?

The primary mechanism by which toxicants cross the cell membrane is through endocytosis.

To be meaningful, dose must always be referenced to time.

The Third National Report on Human Exposure to Environmental Chemicals is part of a long-range biomonitoring project conducted by the CDC at the National Center of Environmental Health (NCEH) attempting to quantify exposure to 250 common environmental chemicals

Toxicants tend to be at equilibrium in the plasma.

The lowest layer of the atmosphere is the

The _____________ is/are an important entry point for toxic gases, solvents, aerosols, and particulates.

When attempting to determine human toxicity to a specific toxicant, it is best to test using _______.