With approximately 450,000 active CPAs in the United States, the CPA certification is the most popular professional designation for accountants. Earning the CPA designation is no easy feat, as the CPA exam is known for its extreme difficulty.
Toxicokinetics (often abbreviated as 'TK') is the description of both what rate a chemical will enter the body and what occurs to excrete and metabolize the compound once it is in the body. It is an application of pharmacokinetics to determine the relationship between the systemic exposure of a compound in experimental animals and its toxicity.
Environmental Toxicology. Environmental toxicology is a young field that has developed rapidly over the past 40 years. Environmental toxicology involves the studying of sources, pathways, transformations, and effects of chemicals that are harmful in the environment. The study of these harmful effects extends from individuals and populations of organisms to the ecosystem level.