What is Glomerular Filtration? - Glomerular filtration is a passive process in which it is the
first step of filtering the blood from the surrounding knot of blood capillaries
from the afferent arteriole and is filtered into the Bowman's capsule, removing
wastes from the blood into the Bowman's capsule (nephron). The glomerulus is a
very efficient filter than most in the body, the reason for this is because of
its filtration membrane (differentially permeable membrane), has a large surface
area and is thousand times more permeable to solutes and water.
Blood passing through the glomerular capillaries is under high
pressure because of the proximity of the renal artery to the heart and the
narrowing of the efferent arteriole. This means that the glomerular blood
pressure is much higher than that of other capillary beds, resulting in a much
higher net filtration pressure, aiding in the process of ultrafiltration.
Net filtration pressure (NFP) is responsible for filtrate
formation, involving forces acting at the glomerulus. Glomerular hydrostatic
pressure (HPg), which is essentially Glomerular blood pressure, is the prime
force pushing water and other solutes out of the blood and across the filtration
membrane or differentially permeable membrane mentioned earlier. The filtrates
consist of water, salt amino acids, creatine, urea, fatty acids, uric acid,
glucose and other vitamins.
first step of filtering the blood from the surrounding knot of blood capillaries
from the afferent arteriole and is filtered into the Bowman's capsule, removing
wastes from the blood into the Bowman's capsule (nephron). The glomerulus is a
very efficient filter than most in the body, the reason for this is because of
its filtration membrane (differentially permeable membrane), has a large surface
area and is thousand times more permeable to solutes and water.
Blood passing through the glomerular capillaries is under high
pressure because of the proximity of the renal artery to the heart and the
narrowing of the efferent arteriole. This means that the glomerular blood
pressure is much higher than that of other capillary beds, resulting in a much
higher net filtration pressure, aiding in the process of ultrafiltration.
Net filtration pressure (NFP) is responsible for filtrate
formation, involving forces acting at the glomerulus. Glomerular hydrostatic
pressure (HPg), which is essentially Glomerular blood pressure, is the prime
force pushing water and other solutes out of the blood and across the filtration
membrane or differentially permeable membrane mentioned earlier. The filtrates
consist of water, salt amino acids, creatine, urea, fatty acids, uric acid,
glucose and other vitamins.