Session 5: Mechanisms and Consequences of
Chemical Exposures - Graziano
• Dose response curves, concept of LD 50, theshold
/ no threshold response
• Net effect of absorption distribution and
elimination on concentration of drug/toxin in body
• Individual variation in drug/ toxin metabolism due
to variations in liver enzymes (cytochrome P450
family - Induction and inhibition of liver enzymes
may increase or decrease drug effect respectively.