Hazards to Human Health

Question 1

What factors are considered when determining the magnitude of an environmental risk?

Answer 1

Account for the Dose

Response assessment, LD50, exposure mechanisms

Question 2

LD50

Answer 2

lethal dose of 50% of sample; causes death in 50% of a test population; smaller LD50= greater toxicity

Question 3

Account for the Dose

Response assessment

Answer 3

how toxic it is at various dosages

Question 4

acute effects of toxins

Answer 4

short

term effects

Question 5

chronic effects of toxins

Answer 5

long term/permanent effects

Question 6

threshold dose

Answer 6

the maximum dose that has no measurable effect

Question 7

ED50

Answer 7

the measurement of the amount of a specific drug that will achieve one-half of maximal response; causes a specific response in 50% of the population

Question 8

dose-response analysis

Answer 8

a process in which an organism is exposed to a toxin at different concentrations, and the dosage that causes the death of the organism is recorded

Question 9

dose-response curve

Answer 9

A graph that represents the relationship between the administered dose and the response produced.

Question 10

two main causes of lung cancer

Answer 10

smoking and radon

Question 11

major air pollutants that are hazards ro human health

Answer 11

nitrogen oxides, sulfur oxides, mercury

Question 12

human health issues nitrogen oxides cause

Answer 12

lung damage

Question 13

human health issues sulfur oxides cause

Answer 13

lung damage

Question 14

human health issues mercury cause

Answer 14

neurological damage