What is the primary physiological action of Sodium Bicarbonate in treating metabolic acidosis?

Sodium Bicarbonate is primarily used in the treatment of metabolic acidosis due to its ability to buffer excess hydrogen ions in the body. When metabolic acidosis occurs, the blood pH decreases due to an increase in hydrogen ion concentration. By administering Sodium Bicarbonate, the bicarbonate ions react with these hydrogen ions, forming carbonic acid, which can then dissociate into carbon dioxide and water. This reaction effectively raises blood pH back towards a more normal level by reducing the concentration of hydrogen ions, thus alleviating the acidosis.

The therapeutic action of Sodium Bicarbonate as a buffer is critical in situations where the body's natural buffering capacity is overwhelmed. This mechanism plays a crucial role in maintaining acid-base balance and preventing complications associated with severe acidosis.