HAZWOPER 40 - Lesson 3 - Toxicology
**Chemical Interactions**
1. What happens when chemicals are combined?
They produce different biological responses than exposure to one chemical alone.
**Route of Exposure**
2. What is the most common route of exposure leading to a toxic dose in the wor...
They produce different biological responses than exposure to one chemical alone.
**Route of Exposure**
2. What is the most common route of exposure leading to a toxic dose in the work environment?
Inhalation
**Toxicity**
3. What does an LD 50 of 25 mg/m3 mean?
A concentration of 25 mg/m3 of a substance is shown to have been fatal to 50% of a test group of
animals.
**Factors Affecting Response**
4. What factors affect response to chemical exposure?
Toxicity, route of exposure, chemical dose
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