泌尿系统教学课件：2泌尿系统2.ppt

文档介绍：Renal physiology
Major Functions of the Kidneys
produce urine?
Major Functions of the Kidneys
1. Regulation of:

(1)body fluid osmolarity and volume
Major Functions of the Kidneys
1. Regulation of:
(1)body fluid osmolarity and volume
(2) electrolyte balance
(3) acid-base balance
(4)blood pressure
2. Excretion of
metabolic products
foreign substances (pesticides, chemicals etc.)
excess substance (water, etc)
3. Secretion of
erythropoitin
1,25-dihydroxy vitamin D3 (vitamin D activation)
renin
prostaglandin
Renal tubules and collecting duct
Functions of the Nephron
Filtration
Reabsorption
Secretion
Excretion
HUMAN RENAL PHYSIOLOGY
Functions of the Kidney:
Filtration:
First step in urine formation
Transport of fluid from blood to kidney tubule
Isosmotic filtrate
Blood cells and proteins don’t filter
GFR = 180 L/day