Bicarbonate ions that enter the plasma during HCO₃⁻ reabsorption are not the same HCO₃⁻ ions that were filtered.

Question

Quizplus · Accepted Answer

Bicarbonate ions are generated within the tubular lumen by the reaction between secreted H+ ions and filtered HCO3- ions. These newly generated bicarbonate ions are then reabsorbed into the plasma, but they are not the same bicarbonate ions that were originally filtered.

Bicarbonate Ions That Enter the Plasma During HCO₃⁻ Reabsorption Are