glomerular filtration

glomerular filtration,

the renal process whereby fluid in the blood is filtered across the capillaries of the glomerulus and into the urinary space of Bowman's capsule.

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filtration

passage through a filter or through a material that prevents passage of certain molecules, e.g. capillary wall, blood-brain barrier, radiographic grid.

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filtration angle

developmental or acquired distortion of this part of the eye is the common cause of glaucoma. It is the space bounded by the sclera externally, the ciliary muscle posteriorly, the root of the iris medially and the anterior chamber of the eye anteriorly. Within the space is the filtering mechanism, a mass of anastomosing mesodermal spindle cells with many perforations between them.

filtration barrier

the physiological function which limits the passage of small molecules through the renal corpuscle.

glomerular filtration

the process by which glomerular filtrate is formed, involving the balance of pressures across the walls of the glomerular capillaries.

inherent filtration

attenuation of the primary x-ray beam as a result of its passage out of the x-ray tube through the insulating medium and tube window.

filtration membrane

the membrane which stretches across the filtration slits in the renal corpuscle.

filtration pressure

the net driving force which pushes fluid into tissue spaces and out of vascular sites; the net result between capillary osmotic pressure and intravascular hydrostatic pressure.

filtration slits

openings in the glomerular corpuscle which are part of the filtration process in the renal glomerulus.

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glomerular

pertaining to or of the nature of a glomerulus, especially a renal glomerulus.

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glomerular basement membrane

the structure located between endothelial cells of renal capillaries and the visceral epithelial cells of the glomerulus. It functions as a barrier to filtration of large molecules.

glomerular capsule

Bowman's capsule.

glomerular crescent

see glomerular crescent.

glomerular diseases

see glomerulonephritis, glomerulonephropathy, glomerulopathy.

glomerular filtrate

the acellular low-protein ultrafiltrate of plasma that passes the glomerulus.

glomerular filtration

see glomerulus.

glomerular filtration rate

varies widely depending on diet. It is the ability of the renal tubules to vary their absorbing capacity that ensures there is no great electrolyte loss during the periods of high rates of glomerular filtration.

glomerular lipidosis

characterized by the presence of large foam cells in glomerular tufts in dogs. They appear to have no disease significance.

glomerular permeability

in normal subjects the capillary endothelium of the glomerulus, by virtue of its fenestration, is permeable to all blood constituents except blood cells and colloids so that the glomerular filtrate has a close similarity to plasma and interstitial fluid but has a lower protein concentration than both of them.