TeXes Science Practice Test 2026 - Free Science Exam Practice Questions and Study Guide

The characteristic that acute toxicity is defined by is its rapid onset following a single exposure to a toxic substance. Most often, acute toxicity manifests within a shorter timeframe, sometimes immediately or within a few hours, as the body reacts swiftly to the presence of the toxin. This distinguishes it from chronic toxicity, which develops slowly and typically requires prolonged exposure to the substance. Understanding this distinction is crucial for recognizing the immediate dangers associated with certain chemicals or poisonous substances, as prompt recognition and response can be vital in situations of accidental exposure.