Which term describes the ability of a chemical to cause harm only after accumulating to a certain level after multiple exposures?

• A. Chronic Toxicity
• B. Acute Toxicity
• C. Bioaccumulation
• D. Hazard

Answer: (A)

Harm that shows up only after the substance has built up in the body from repeated exposures is chronic toxicity. Acute toxicity is immediate harm from a single exposure, so it doesn’t fit the idea of needing time and multiple exposures. Bioaccumulation describes the buildup process itself—how a chemical concentrates in an organism over time—but it’s the resulting adverse health effects after that buildup reaches a threshold that we call chronic toxicity. Hazard is about the potential for harm in general, not the timing or dose needed to cause effects. A real-world example is a toxin that gradually accumulates in bones or organs and causes health problems after years of exposure.