Session
Four: Exposure Assessment & Dosage
Text Readings: |
Biomarkers
in Risk Assessment: Validity & Validation
(2001) International
Programme on Chemical Safety (IPCS), World Health Organization,
Washington, D.C., Chapters 1-3.
Human
Exposure Assessment
(2000) Environmental Health Criteria 214, International
Programme on Chemical Safety, The World Health Organization, Washington,
D.C., Chapters 1-2.
Principles
for the Assessment of Risks to Human Health from Exposure to
Chemicals (1999)
International Programme on Chemical Safety (IPCS), World Health
Organization, Washington, D.C., Chapter 5.
Guidelines
on Studies in Environmental Epidemiology (1983)
International
Programme on Chemical Safety, World Health Organization,
Washington, D.C., Chapter
3.
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Learning
Objectives: |
Upon
completion of this class, students will:
- Upon completing
this class, students will:
- Understand the
processes and terminology utilized in exposure assessment.
- Appreciate how
various types of biomarkers are utilized in exposure assessment
and risk assessment.
- Will understand
dosage and the dose response relationship
- Be familiar with
how biomarkers are validated in risk assessment.
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Assignment
for Class Four: |
- How is validity
defined in the context of epidemiological research involving
biomarkers?
- Define exposure
and exposure assessment.
- Please
discriminate between the following terms: Potential Dose,
Applied Dose, Internal Dose, Absorbed Dose, Delivered Dose, and
Biologically Effective Dose
- Also distinguish
the difference between a "biological effect" and an
"adverse effect."
- Please explain
what the following terms mean: Source, Exposure Pathway,
Exposure Concentration, Exposure Route, Intake, & Uptake).
- Provide 3
examples of types of uncertainty that might be expected to be
associated with exposure assessment. Likewise provide 3 examples
of types of variability one might encounter.
- Identify the basic
information needed for exposure assessments in regard to risk
assessment and in regard to risk management.
- Within what
disciplines has exposure assessment data been fruitfully used?
Please describe how the data is used within each discipline.
- Provide 3 examples
of sources of error in biomarker measurement in epidemiological
studies.
- Identify 3 types
of biomarkers and describe the characteristics of each type.
- How are exposure
biomarkers validated? How are effect biomarkers validated?
- What is meant by
the term "cross-species comparability"?
- Although there is
reasonable agreement that human exposure means contact with the
chemical or agent, there is some ambiguity regarding exactly
what the nature of this chemical/human contact entails. Please
explain what this ambiguity entails.
- How have the 1992
EPA Guidelines resolved this ambiguous issue?
- Exposure (or
dose) is assessed generally by utilizing one of three approaches.
Please describe each approach.
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Sessions
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