AEP Environmental Health & Toxicology 2

Question 1

In human health risk assessment, cancer risk from chronic chemical exposure is calculated as:

Accepted Answer

Risk = Chronic Daily Intake (CDI) × Cancer Slope Factor (CSF)

Answer

Cancer risk is determined by multiplying the Chronic Daily Intake by the Cancer Slope Factor (also called the oral slope factor or potency factor).

Question 2

The Hazard Quotient (HQ) used in non-cancer risk assessment is calculated as:

Accepted Answer

Exposure dose divided by the reference dose

Answer

HQ = Exposure Dose / Reference Dose; an HQ greater than 1.0 indicates potential concern for non-cancer adverse health effects.

Question 3

For residential sites with soil contamination, which exposure pathway typically contributes most to risk for young children?

Accepted Answer

Incidental soil ingestion and dermal contact with soil

Answer

Young children are especially vulnerable to soil ingestion (hand-to-mouth behavior) and dermal contact with contaminated surface soil at residential sites.

Question 4

ATSDR Toxicological Profiles serve which primary purpose in environmental health practice?

Accepted Answer

Providing comprehensive health effects and exposure data for specific hazardous substances

Answer

ATSDR Toxicological Profiles are peer-reviewed documents that comprehensively summarize health effects, exposure pathways, and toxicokinetic data for specific hazardous substances.

Question 5

Which statement most accurately describes the dose-response relationship in toxicology?

Accepted Answer

The quantitative relationship between the amount of chemical exposure and the magnitude of biological effect in a population

Answer

The dose-response relationship is the fundamental toxicological principle describing how the severity or frequency of an effect varies with dose.

AEP - Associate Environmental Professional Certification Practice Test

AEP - Associate Environmental Professional Certification Practice Test

AEP Environmental Health & Toxicology 2