Friday, November 4, 2011

2.71) Ultrafiltration


Describe ultrafiltration in the Bowman's capsule and the composition of the glomerular filtrate
Nephron carries out the filtration of our blood, which will result into filtered blood and urine.
Urine is composed largely of water, salts (Sodium chloride, etc.) and urea (which contains toxic nitrogen waste of the body). 

The first process started at Bowman's capsule...
Bowman's capsule - where the filtration process begins, known as ultrafiltration of molecules. 

Blood arrives in the kidney through the blood vessel called afferent arteriole where the blood is under high pressure. Blood vessels then started to brand and became very much slower into twisted parts called glomerulus. The blood then comes out through the blood vessel efferent arteriole in which the diameter of this vessel is smaller and more narrow than the afferent arteriole's. The consequence of narrowed vessels is the increase of blood pressure. In other words, the blood pressure increases in the glomerulus. 

Moreover, this forces the liquid within blood called plasma which contains all the components dissolved in blood, for instance, water (solvent), salts, amino acid, glucose, and urea, out of the blood vessel and into the inner space of Bowman's capsule. When the plasma is forced into the Bowman's capsule we called it glomerula filtrate. 

To conclude, the blood has been filtered through undergoing high pressure due to the narrowing glomerulus, which forces in plasma out from the blood (in the Bowman's capsule.) 



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