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What does the effect of a hazardous substance depend on?
Only the concentration of the substance
The chemical/material, concentration, route of entry, and duration of exposure
The individual's age and health status only
Only the route of entry into the body
The correct answer is: The chemical/material, concentration, route of entry, and duration of exposure
The effect of a hazardous substance is influenced by several interrelated factors, making the correct answer comprehensive in scope. The chemical or material itself defines its inherent properties and potential hazards. However, the concentration of that substance plays a crucial role in determining the level of exposure and potential harm. Additionally, the route of entry—whether inhalation, ingestion, or dermal contact—significantly affects how the substance interacts with the body. Different substances can have varying effects based on the route, as some may be more harmful when inhaled than when ingested, for example. Furthermore, the duration of exposure is vital; a brief exposure to a high concentration of a hazardous substance might cause different effects compared to prolonged exposure to a lower concentration. Considering all these elements offers a more accurate understanding of the risks posed by hazardous substances, recognizing that it's not simply about one factor, but a combination that dictates the overall impact on health.