Toxicokinetics is the study of what?

• A. Movement of toxins in the environment
• B. Movement of toxins in the body
• C. Chemical breakdown in laboratory settings
• D. Metabolism rate of toxins in the liver

Answer: (B)

Toxicokinetics describes what happens to a toxin after it enters the body, focusing on its journey through absorption into the bloodstream, distribution to tissues, metabolism by the body's enzymes, and eventual excretion. This sequence—how the toxin moves, changes form, and is removed—determines how much exposure reaches target organs and how long it stays active. That broad view is why the correct answer is about the movement of toxins in the body. The other ideas describe environmental movement, lab breakdown, or metabolism in just one organ, which don’t capture the whole process inside a living organism. For example, an inhaled solvent may enter the blood, reach the brain, be metabolized by the liver, and be eliminated in urine; each step is part of toxicokinetics.