Exposure timing can be classified into three main categories:
Acute Exposure: This involves a single or short-term exposure to a toxicant. Acute exposures can lead to immediate health effects, which might be severe. Chronic Exposure: This refers to prolonged or repeated exposure over an extended period. Chronic exposure can result in gradual health effects that may not be immediately noticeable. Subchronic Exposure: Occurring over weeks or months, subchronic exposure falls between acute and chronic exposure. It can provide insights into the potential long-term effects of a toxicant.