AP Environmental Science · Pollution & Human Health
Dose-Response Relationship
"The dose makes the poison." This curve shows how the mortality of a test population changes as the concentration (dose) of a chemical increases.
Lethal Dose 50 (LD50)
The exact dose required to kill 50% of the test population. It is the standard measure of acute toxicity.
Threshold Level
The maximum dose that has no measurable harmful effect on the population. Below this point, mortality remains at 0%.
Tags
APESToxinsLD50Human Health
Toxicity Comparison
Compare the sigmoidal dose-response curves of two toxins. Analyze which chemical is more toxic based on the position of its LD50.
Select Substance to Analyze
Data Analysis
Toxin A represents a highly toxic substance (e.g., Botulinum Toxin or Cyanide). Notice how it reaches 50% mortality at a very low dose. A lower LD50 means higher toxicity.