Homework Sourse2 Reference doses RfDs derived from epidemiologic data gener
2) Reference doses (RfDs) derived from epidemiologic data generally would involve fewer uncertainty factors than those derived solely from animal data.
True or False
3) In estimating actual human exposures to an environmental hazard, risk assessors often employ conservative, \"health-protective\" assumptions that presume people are exposed to the highest level of hazard that can be considered credible.
True or False
4) New animal toxicity data has recently become available that strongly indicates the Reference Dose (RfD) for a regulated chemical found in drinking water should be decreased by two-fold in order to be protective of public health. One option regulators would have to maintain the prevailing level of population health protection for this chemical would be reduce it\'s legally allowable limit in drinking water by two-fold.
True or False
Solution
Question
T/F
Explantion
2) Reference doses (RfDs) derived from epidemiologic data generally would involve fewer uncertainty factors than those derived solely from animal data.
True
RfD is the safer limit of the exposure to any kind of drug without getting any deleterious effect during the life time.
In epidemiology, by taking define population, we will study and analyze the effects and causes due to the exposure to any chemical or drug, there will be fewer uncertainty factors.
3) In estimating actual human exposures to an environmental hazard, risk assessors often employ conservative, \"health-protective\" assumptions that presume people are exposed to the highest level of hazard that can be considered credible.
True
By using the conservative and health protective assumptions, in many cases, they will make the people to assume that they are exposed to highest level of hazard.
4) New animal toxicity data has recently become available that strongly indicates the Reference Dose (RfD) for a regulated chemical found in drinking water should be decreased by two-fold in order to be protective of public health. One option regulators would have to maintain the prevailing level of population health protection for this chemical would be reduce it\'s legally allowable limit in drinking water by two-fold.
True
When the chemical is harmful and as per the new toxicity data, when it has to be decreased by two-fold, then it’s addition should be reduced to achieve the allowable limit in drinking water
| Question | T/F | Explantion |
| 2) Reference doses (RfDs) derived from epidemiologic data generally would involve fewer uncertainty factors than those derived solely from animal data. | True | RfD is the safer limit of the exposure to any kind of drug without getting any deleterious effect during the life time. In epidemiology, by taking define population, we will study and analyze the effects and causes due to the exposure to any chemical or drug, there will be fewer uncertainty factors. |
| 3) In estimating actual human exposures to an environmental hazard, risk assessors often employ conservative, \"health-protective\" assumptions that presume people are exposed to the highest level of hazard that can be considered credible. | True | By using the conservative and health protective assumptions, in many cases, they will make the people to assume that they are exposed to highest level of hazard. |
| 4) New animal toxicity data has recently become available that strongly indicates the Reference Dose (RfD) for a regulated chemical found in drinking water should be decreased by two-fold in order to be protective of public health. One option regulators would have to maintain the prevailing level of population health protection for this chemical would be reduce it\'s legally allowable limit in drinking water by two-fold. | True | When the chemical is harmful and as per the new toxicity data, when it has to be decreased by two-fold, then it’s addition should be reduced to achieve the allowable limit in drinking water |
