Toxicology

Toxicology involves the study of the adverse effects of chemical substances on living organisms. At the cellular level, toxins can disrupt cellular function by interfering with metabolic processes, damaging organelles, and inducing oxidative stress. For instance, heavy metals like lead can inhibit enzymatic reactions and alter mitochondrial function, leading to reduced ATP production and increased free radical formation. This cellular damage can manifest as apoptosis or necrosis, depending on the concentration and duration of exposure. In tissues, toxins can cause inflammation, fibrosis, and eventual organ dysfunction. For example, acetaminophen overdose results in the depletion of glutathione, leading to hepatic necrosis. Understanding these mechanisms is crucial for effective management and treatment of poisoned patients.