Lecture 22

Question 1

List and describe the 3 types of hazards

Answer 1

Chemical- Harmful substances in air, water, soil, and food
Physical- Radiation, fire, natural disasters, lightning
Biological - bacteria, viruses, allergens

Question 2

Define risk

Answer 2

the level of possible suffering caused by a hazard

Question 3

What are some cultural hazards?

Answer 3

smoking, drinking, driving, drugs, poor diet

Question 4

Define Toxicity

Answer 4

a measurement of the amount of harm, injury or risk of death a chemical hazard possesses

Question 5

Define Dose

Answer 5

The amount of the toxic chemical absorbed, inhaled, injected or ingested

Question 6

Define solubility

Answer 6

whether or not a chemical can dissolve in fat-solvents or water-solvents

Question 7

Define Persistence

Answer 7

A term used to describe the longevity of a chemical hazard

Question 8

Define bioaccumulation

Answer 8

chemical hazards that are stored in specific body cells or tissues at above average concentrations

Question 9

Define biomagnification

Answer 9

level of chemical hazard increases as it moves up the food chain

Question 10

Define antagonistic

Answer 10

reactions decrease toxicity

Question 11

Define synergistic

Answer 11

interactions increase toxicity

Question 12

Define response

Answer 12

the amount and type of health injury/damage caused from exposure to a hazard

Question 13

Define acute response

Answer 13

immediate/short term , generally from high concentration

Question 14

Define chronic response

Answer 14

long term, generally from low concentrations over long periods of time

Question 15

List the different types of pathogens, and describe their prevalence

Answer 15

Bacteria, viruses, protozoa, parasites, fungus, etc