|    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. 
               |  
          | 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 relationshipBe familiar with
                how biomarkers are validated in risk assessment. |  
          | 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 DoseAlso 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.   |  Sessions   |