Kidney functions 口 Endocrine functions VErythropoiesis---erythropoietin BLood pressure---renin VBone and mineral metablism ---VitD activation d Internal Environment Homeostasis regulation fluid acid-base homeostasis V Acid excretion---metabolic acidosis V Potassium excretion---hyperkalemia, hypokalemiaKidney functions  Endocrine functions √Erythropoiesis---erythropoietin √Blood pressure---renin √Bone and mineral metablism---VitD activation  Internal Environment Homeostasis regulation fluid, acid-base homeostasis √ Acid excretion---metabolic acidosis √ Potassium excretion---hyperkalemia, hypokalemia