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- 1. Multiple Choice
What percentage of commercial chemicals have been tested for toxicity?
10
30
50
90
- 2. Multiple Choice
What is the main defense against viral diseases?
Antibiotics
Pesticides
Vaccination
Epidemiology
- 3. Multiple Choice
All of the following are natural sources of pollution except
lead
dust
volcanoes
burning fuels
- 4. Multiple Choice
Pathogens can be spread by
breathing contaminated air.
drinking contaminated water
secondary hosts.
All of the above.
- 5. Multiple Choice
Which of the following is an emerging virus?
measles
diphtheria
Dengue fever
Schistosomiasis
- 6. Multiple Choice
What is the difference between pollution from natural sources and pollution from human activities?
Naturally occurring pollutants are less toxic.
Pollution from human activities has not been researched.
Pollution from human activities can be predicted and controlled.
Naturally occurring pollutants are only hazardous in small dosages
- 7. Multiple Choice
_________________ is the vector that may spread disease such as malaria or Dengue infection.
Rodents
Mosquitoes
Humans
Water
- 8. Multiple Choice
Which of the following statements is correct?
Landfills solved pollution problems caused by waste disposal.
Wastewater from cities no longer carries toxic chemicals into waterways.
Laws regulating waste disposal have put an end to pollution problems caused by wastes.
Much of the pollution in our environment is a byproduct of inadequate waste disposal.
- 9. Multiple Choice
Toxicology is used to determine
the classification of a pathogen.
the vectors of a disease.
how poisonous a substance is.
what emerging viruses cause disease.
- 10. Multiple Choice
Which of the following substances is a heavy metal, pollutant that is associated with nerve damage?
organophosphates
PCBs
lead
hormones
- 11. Multiple Choice
People may be infected by ___________ when they improperly handle or consume contaminated meat.
Salmonella
malaria
Dengue fever
influenza
- 12. Multiple Choice
_________________ is the vector that may spread disease such as malaria or Dengue infection.
Rodents
Mosquitoes
Humans
Water
- 13. Multiple Choice
People in developing nations are more likely than people in developed nations to die from
cancer
diabetes
heart disease
environmental issues
- 14. Multiple Choice
Which of the following is an infectious disease that is spread through drinking water polluted by human feces?
Dysentery
Malaria
Influenza
Hanta virus
- 15. Multiple Choice
The environment is an important factor in the spread of cholera and dysentery because
air can carry the pathogens.
water provides a habitat in which the pathogens breed.
the pathogens reproduce in soil.
the disease is transmitted by mosquitoes.
- 16. Multiple Choice
Which of the following pollutants is used in agriculture and landscaping and might cause nerve damage, birth defects, and cancer in humans?
particulate matter
lead
pesticides
bacteria
- 17. Multiple Choice
In the case of European strains of pneumonia, what has happened to antibiotic resistance over time?
The percentage of resistant bacteria has increased.
The percentage of resistant bacteria has decreased.
The percentage of resistant bacteria has remained the same.
There is no data on these variables.
- 18. Multiple Choice
Which of the following does not determine the toxic effect of a chemical?
Dose
Resistance
Exposure
Body size
- 19. Multiple Choice
Which of the following pollutants is likely to be the biggest problem for people who have asthma?
pesticides
particulate matter
lead
DDT
- 20. Multiple Choice
Which of the following terms and definitions are incorrectly matched?
toxic: poisonous
ingested: taken into the body
threshold dose: the level at which a substance begins to cause health problems
epidemiology: the study of the harmful effects of substances on organism
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