Phosphate Buffer System

The phosphate buffer system is a way the body maintains stable pH levels in fluids, particularly in cells and blood. It uses weak acids and their corresponding salts, primarily hydrogen phosphate and dihydrogen phosphate, to neutralize excess acids or bases. When pH levels drop (becoming more acidic), the system can absorb hydrogen ions, helping to restore balance. Conversely, if the pH rises (becomes more basic), it can release hydrogen ions. This balance is crucial for enzyme function and overall cellular health, ensuring that biological processes work efficiently.