proximal tubule


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Related to proximal tubule: loop of Henle, Distal tubule

proximal tubule

The first part of the tubular system of a nephron after the Bowman's capsule. It has convoluted and straight segments and is followed by the distal tubule.

proximal tubule

the convoluted tube between the loop of Henle and Bowman's capsule in the vertebrate kidney.

tubule

a small tube; a minute canal found in various structures or organs of the body.

collecting t's
the terminal channels of the nephrons which open on the summits of the renal papillae or renal crests.
convoluted t's
channels which follow a tortuous course. See also renal tubules (below) and tubuli contorti.
dentinal t's
minute channels in the dentine of a tooth that extend from the pulp cavity to the cement or the enamel. Called also dentinal canaliculi.
galactophorous t's
small channels for the passage of milk from the secreting cells in the mammary gland. Called also lactiferous ducts.
Henle's t's
see henle's tubules.
lactiferous t's
see lactiferous ducts.
mesonephric t's
the tubules comprising the mesonephros, or temporary kidney, of amniotes.
metanephric t's
the tubules comprising the permanent kidney of amniotes.
proximal tubule
intrarenal site for the reabsorption of most of the protein in the tubular fluid.
proximal convoluted tubule
the portion of the nephron immediately succeeding the glomerulus; susceptible to disease because of its early exposure to toxins in the glomerular filtrate.
renal t's
the minute canals made up of basement membrane and lined with epithelium, composing the substance of the kidney and secreting, reabsorbing, collecting and conducting the urine. Include proximal convoluted, the nephron loop (containing the proximal straight tubule, descending and ascending thin, and the distal straight tubules) and the distal convoluted tubules.
seminiferous t's
the tubules of the testis, in which spermatozoa develop and through which they leave the gland.
uriniferous t's
renal tubules; channels for the passage of urine.
References in periodicals archive ?
2-] ion secretions may also occur in proximal tubule segments (Marshall and Grosell, 2005).
27) Elevated levels of glucose in glomerular filtrate causes an increase in glucose absorption of proximal tubules and intracellular glucose deposition.
If exercise was to be accepted as a stress inducer and had a similar resistance generating effect on proximal tubule cells, the kidneys of exercisers would be more resistant to subsequent attacks and the renal functional capacity of trained athletes would be greater than those having a sedentary lifestyle.
The authors interpreted the absence of glycosuria and of urate and phosphate wasting as evidence of intact proximal tubule function.
Glomerulotubular balance is maintained because sodium reabsorption in the proximal tubule is by cotransport with glucose, amino acids, and other substances.
GLUTAMINASE EXPRESSION IN A TRANSFECTANT RAT PROXIMAL TUBULE CELL LINE.
The kidney developed by Humes and colleagues is a renal-tubule-assist device that utilizes proximal tubule cells from pigs.
In vitro CTP-499 prevented the formation of matrix-forming fibroblasts from kidney proximal tubule cells, a process which may contribute to renal fibrosis in vivo.
Immunophenotypic characterization has determined the neoplastic cell expresses proximal tubule markers, such as CD10, RCC marker, [alpha]-methyl-acyl-coenzyme A (AMACR; also known as racemase or P504S), and GST-[alpha], but it may also aberrantly express distal tubule markers, such as BerEP4.
The remaining 10% of glucose that is reabsorbed occurs in the more distal segment of the proximal tubule through the action of the low-capacity, high-affinity SGLT-1.