pH regulation refers to the process of maintaining the acidity or alkalinity of a solution, typically measured on a scale from 0 to 14. A pH of 7 is considered neutral, while values below 7 indicate acidity and values above 7 indicate alkalinity. This regulation is crucial in various biological and chemical systems, as even small changes in pH can significantly affect reactions and processes. In living organisms, buffers play a key role in pH regulation by neutralizing excess acids or bases. For example, the human body uses bicarbonate and phosphate buffers to maintain a stable pH in the blood, which is essential for proper cellular function and overall health.