Compared to the carbonic acid-bicarbonate buffering system in extracellular fluid,how effective is the phosphate buffering sytem?

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Quizplus · Accepted Answer

The phosphate buffering system is about one-sixth as effective as the carbonic acid-bicarbonate buffering system in extracellular fluid. The carbonic acid-bicarbonate buffering system is the primary buffer system in the body and is responsible for maintaining the pH of extracellular fluid within a narrow range. Phosphate buffering system can still play a role in buffering excess hydrogen ions in intracellular fluid, but it is not as effective as the carbonic acid-bicarbonate buffering system in extracellular fluid.

Compared to the Carbonic Acid-Bicarbonate Buffering System in Extracellular Fluid,how