Normal function of the kidney 1. Excretion Remove waste product from the body Regulate electrolyte and acid-base balance 2. Endocrine Produce renin、EPo、1,25(OH)2D3and 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