(2) Sources of bases 1) products of metabolism (small amounts Such as ammonia(nh3) 2)dietary intake (vegetables and fruits sodium citrate acids production >>bases, in commen renal reabsorption(2) Sources of bases 1)products of metabolism (small amounts)Such as ammonia (NH3 ) 2)dietary intake(vegetables and fruits) sodium citrate *acids production >>bases, in commen *renal reabsorption