Question

1. What are risk and risk assessment? 2. What are the four steps of risk assessment? 3. What is the difference between toxicology and epidemiology? 4. Why is the fecal coliform test performed on public drinking water supplies? 5. How is the incidence of swine flu related to human activities that alter the environment? 6. What is a dose-response curve? 7. What is one way that scientists determine whether a chemical causes cancer? What are the two problems with this method? 8. What are the three ways that chemical mixtures interact? 9. Why are children particularly susceptible to toxicants? 10. What is the precautionary principle? 11. What are two criticisms o the precautionary principle?

Answer 1

Answer: Risk is a threat or the factors which can cause harm. The risk assessment involves all together identifying, analysing, evaluating as well as eliminating the risk factors.

The four steps of risk assessment are:

• Identification of the risk
• Analysis of the risk
• Evaluating the risk
• Eliminations of the risk.

The toxicology is the study of adverse effect of chemical substances on the human wheras epidemiology is the study of the occurance of disease, factors involved etc.

The public drinking water may contain the traces or the amount present in the water. The fecal coliform bacteria that present in the stool. So, to remove the contamination from the water to make it available for drinking purpose.