5. In which order, from first to last, do the elements of a risk assessment occur?

A. Risk characterization -> Hazard identification -> Dose-response assessment -> Exposure assessment

B. Hazard identification -> Exposure assessment = Dose-response assessment -> Risk characterization

C. Risk characterization -> Dose-response assessment -> Exposure assessment -> Hazard identification

D. Dose-response assessment -> Exposure assessment -> Hazard identification -> Risk characterization

6. Long-term chronic tests of chemicals at different doses are carried out in which step?

A. Hazard identification

B. Dose-response assessment

C. Exposure assessment

D. Risk characterization

7. When a toxic substance affects the blood it is called

A. Pulmanotoxicity

B. Heptatoxicity

C. Nephrotoxicity

D. Hematotoxicity

8. A chemical once ingested can never be metabolized to produce a more toxic substance

A. true

B. false

9. To our best knowledge, chlorinated hydrocarbons affect especially these tissues.

A. heart and soft tissue

B. lungs and gastrointestinal tract

C. liver and kidneys

10. The extrapolation to individuals of different sizes is possible thanks to

A. the existence of a conventional rating system

B. the dose being expressed as milligram of chemical ingested per kilogram of body weight

C. the mortality being given in percent

D. the use of a logarithmic scale

11. How many pounds of sucrose does it take to kill a man?

A. 1 lb

B. 2 lbs

C. 3 lbs

D. 4 lbs

12. Would you rather be exposed to 100 mg/kg of Chemical A or Chemical C as represented in Figure 4.4?

A. Chemical A

B. Chemical B

C. Chemical C