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Glomerular filtration rate (GFR) is the volume of fluid filtered from the renal (kidney) glomerular capillaries into the Bowman's capsule per unit time. [4] Central to the physiologic maintenance of GFR is the differential basal tone of the afferent (input) and efferent (output) arterioles (see diagram).
The Glomerular filtration rate (GFR) is regarded as the best overall measure of the kidney's ability to carry out these numerous functions. An estimate of the GFR is used clinically to determine the degree of kidney impairment and to track the progression of the disease. The GFR, however, does not reveal the source of the kidney disease.
Blood creatinine concentrations may also be used alone to calculate the estimated GFR (eGFR). The GFR is clinically important as a measurement of kidney function . However, in cases of severe kidney dysfunction the CrCl rate will overestimate the GFR, because hypersecretion of creatinine by the proximal renal tubules will account for a larger ...
Along with the increase in pressure. At low perfusion pressures, Angiotensin II may act by constricting the efferent arterioles, thus mainlining the GFR and playing a role in autoregulation of renal blood flow. [3] People with poor blood flow to the kidneys caused by medications that inhibit angiotensin-converting enzyme may face kidney failure ...
This filtrate then flows along the length of the nephron, which is a tubular structure lined by a single layer of specialized cells and surrounded by capillaries. The major functions of these lining cells are the reabsorption of water and small molecules from the filtrate into the blood, and the secretion of wastes from the blood into the urine.
They allow for the filtration of fluid, blood plasma solutes and protein, while at the same time preventing the filtration of red blood cells, white blood cells, and platelets. The glomerulus has a glomerular basement membrane sandwiched between the glomerular capillaries and the podocytes .
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