Hydrogen Ions(free protons) are a constant threat to the survival

of our cells and therefore our lives. What mechanism do the kidneys possess that allows the quick removal of extracellular acid(via urine)?


A. The filtration protein allows free protons to be captured and removed in the urine.
B. Reabsorption of filtered protein allows more extracellular buffers.
C. The secretion of hydrogen ions allows for the urinary removal of extracellular acid.
D. The renal-colonic mechanism allows hydrogen ions to be removed via the feces.