#Buffering - exchangeable calcium is present in bone salts - amorphous calcium phosphate (CaHPO4) is in a state of reversible equilibrium with calcium and phosphorous in extracellular fluid. Exchangeable calcium is alsp present in mitochondria. | #Buffering - exchangeable calcium is present in bone salts - amorphous calcium phosphate (CaHPO4) is in a state of reversible equilibrium with calcium and phosphorous in extracellular fluid. Exchangeable calcium is alsp present in mitochondria. |