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CH3041
EXPOSURE TYPES
    Type          Time             Area
1) Acute local       1s- 24h  skin, eyes, mm’s
2) Chronic local      1d- 10y  skin, eyes, mm’s
3) Acute systemic   1s - 24h  inhalatn, ingestn
                                                   remote organs
4) Chronic systemic 1d - 10y inhalatn,ingestn
        remote organs
• Usually an acute exposure will be a single
dose of the chemical.
•To find the response of an organism to
a toxicant dose-response curves are used.