Normal function of the kidney 1.Excretion Remove waste product from the body Regulate electrolyte and acid-base balance 2 Endocrine Produce renin、EPO、125(oH2D3and prostaglandins Inactivate gastrin, PTH4 Normal function of the kidney Remove waste product from the body； Regulate electrolyte and acid-base balance. 1.Excretion Produce renin、EPO、1,25(OH)2D3 and prostaglandins； Inactivate gastrin、PTH. 2. Endocrine