Module 16 Flashcards
Risk
The probability of harmful effects to human health resulting from exposure to an environmental hazard
Non-transmissible disease
A disease that can’t be spread from person to person
Communicable disease
A disease that can be spread from person to person
Pathogen
Anything that can produce a disease
Virus
A pathogen that works by invading a cell and taking over that cell’s machinery to copy itself
Epidemic
An outbreak that is limited to one area or region
Pandemic
A disease that spreads globally
Toxicology
Study of the detrimental effects chemicals have on living organisms
Biomagnification
Occurs when chemicals that accumulate in body tissues are passed from one organism to another through the food chain
Dose-response curve
An LD50 graph
Acute effect
Immediate response to a chemical
Chronic effect
Long-term exposure to a chemical
Median lethal dosage
Dose required to be lethal for 50% of a test population
Non-threshold dose-response model
If the response to a chemical begins at 0 and increase continuously with a dosage
Threshold dose-response
Shows that harmful effects of a chemical do not occur until after the dose exceeds a threshold level