Excretory System- Sec 5 Three Steps of Urine Formation
- 8 years ago
Biology (Zoology - Grade 11):High School learning: 3 Steps of urine formation
The 3 Detailed Structure of Urine Formation.
Glomerular Filtration- Filtration causes through pressure from following layers.
1- Endothelium
2- Epithelium
3- Basement Membrane
Epithelial Cells (Podocytes):
Almost all constituent of blood plasma except the proteins pass into the lumen of Bowman’s capsule.
Almost 1100-1200 ml of blood is filtered by kidney per minute. It constitutes 1/5th of the blood pumped out by each ventricle of the heart in a minute.
1: GLOMERULAR FILTERATION -
. Amount of filterate formed in per minute is called GLOMEULAR FILTERATION.
. Normal GFR=125 ml/minute.
2: RE ABSORPTION- Process of reclaiming water and the other substances from the tubular fluid Sodium Re absorption Water Re absorption Glucose
180 liter of globular filtrate is produced daily. But alcohol 99% is absorbed by the renal tube.
So normal urine is released is 1.5 liter.
Substances like glucose, amino acids,Na+, etc in filtrate are reabsorbed actively.
Nitrogenous wastes are absorbed by passive transport.
- Why it has power of re absorption?
Simple cuboidal brush border epithelium of pct increases surface area of re absorption.
Tubular Secretion-Cells of PCT and DCT maintain a ionic and acid based balance of body fluids by selective secretion of H+,K+
Concentration of Filtrate.
Videos by Edupedia World(www.edupediaworld.com), Online Education.
All Rights Reserved.
The 3 Detailed Structure of Urine Formation.
Glomerular Filtration- Filtration causes through pressure from following layers.
1- Endothelium
2- Epithelium
3- Basement Membrane
Epithelial Cells (Podocytes):
Almost all constituent of blood plasma except the proteins pass into the lumen of Bowman’s capsule.
Almost 1100-1200 ml of blood is filtered by kidney per minute. It constitutes 1/5th of the blood pumped out by each ventricle of the heart in a minute.
1: GLOMERULAR FILTERATION -
. Amount of filterate formed in per minute is called GLOMEULAR FILTERATION.
. Normal GFR=125 ml/minute.
2: RE ABSORPTION- Process of reclaiming water and the other substances from the tubular fluid Sodium Re absorption Water Re absorption Glucose
180 liter of globular filtrate is produced daily. But alcohol 99% is absorbed by the renal tube.
So normal urine is released is 1.5 liter.
Substances like glucose, amino acids,Na+, etc in filtrate are reabsorbed actively.
Nitrogenous wastes are absorbed by passive transport.
- Why it has power of re absorption?
Simple cuboidal brush border epithelium of pct increases surface area of re absorption.
Tubular Secretion-Cells of PCT and DCT maintain a ionic and acid based balance of body fluids by selective secretion of H+,K+
Concentration of Filtrate.
Videos by Edupedia World(www.edupediaworld.com), Online Education.
All Rights Reserved.