Download Biological and Chemical hazards

Chapter 17 hazards and human health
Biological Hazards
1. Define the following: infectious disease, epidemic, pandemic.
2. How do transmissible and nontransmissible diseases differ and give some
examples of each.
3. What is Vibrio and why is it becoming a problem?
4. What is TB and why is it becoming a problem?
5. Name and briefly describe the top three viral killers in the world.
6. Explain how West Nile is transmitted.
7. What is AIDS and HIV and what does it lead to? How is AIDS treated and how
has it affected populations and life expectancy?
8. Explain the malaria cycle and how many people has it killed.
9. How is malaria controlled around the world and why is it difficult to do?
10. What are WHO’s solutions to reduce infectious disease ?
Chemical Hazards
1. Name and define three major types of toxic agents. List examples.
2. What are PCBs, where do they come from and what problems do they cause
3. How can mercury be prevented and controlled?
4. What are HAA’s, hormone blockers, and phthalates and what do they do? Give
examples of each
5. Give a brief summary about the Bhopahl India accident. (look on-line for this)
6. What is toxicology?
7. List several factors that affect the harm caused (response)by a substance in
humans.
8. Explain the difference between acute and chronic affects in humans.
9. What are the three major reasons why infants and young children are more
susceptible to toxins than adults?
10. Explain the concept of dose-response curve and LD50. Explain the two types od
curves.
11. What is an epidemiological study and what are its limitations?
12. What is the precautionary principle in regards to chemical toxicity? Why is
important and how far should we go with it?