What is a chemical's median lethal dose?
A) This is the dose where an animal would be expected to show an acute response.
B) This corresponds to the highest point on a dose-response curve.
C) This is the level that a chemical becomes slightly toxic.
D) This is the dose that can kill 50% of the animals in a test population within a given time period.
E) This is the dose that will kill most of the medium sized animals in a test population.

Question

Quizplus · Accepted Answer

The median lethal dose (LD50) is the dose at which 50% of the animals in a test population die within a given time period. This is often used to determine the relative toxicities of different chemicals.

What Is a Chemical's Median Lethal Dose