renal tubule


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tubule

 [too´būl]
a small tube; especially, a minute canal found in various structures or organs of the body. adj., adj tu´bular.
collecting t's the terminal channels of the nephrons, which open on the summits of the renal pyramids in the renal papillae.
convoluted t's channels that follow a tortuous course; there are convoluted renal tubules and convoluted seminiferous tubules.
dentinal t's the tubular structures of the teeth.
galactophorous t's small channels for the passage of milk from the secreting cells in the mammary gland.
Henle's t's the straight ascending and descending portions of a renal tubule forming Henle's loop.
lactiferous t's galactophorous tubules.
mesonephric t's the tubules comprising the mesonephros, or temporary kidney, of amniotes.
metanephric t's the tubules comprising the permanent kidney of amniotes.
renal tubule the minute canals composing the substance of the kidney and secreting, collecting and conducting the urine; in the glomerulus they have a basement membrane and epithelial lining.
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.

renal tubule

Etymology: L, ren, kidney, tubulus, small tube
the part of the kidney's nephron that leads from the glomerulus to the collecting tubules. It consists of a looping segment and two convoluted sections. These canals resorb selected materials back into the blood and secrete, collect, and conduct urine.

renal tubule

The part of a nephron through which renal filtrate from the renal corpuscle flows and is changed to urine by reabsorption and secretion. The parts, in order, are the proximal convoluted tubule, the loop of Henle, the distal convoluted tubule, and collecting tubule.
See: kidney for illus; nephron
See also: tubule
References in periodicals archive ?
In contrast to the studies in the gill, the first aquaporin reported in fish kidney was an AQP 10-like paralog in gilthead seabream, expressed in renal tubules of "undefined origin" (Santos et al.
CONCLUSIONS: The decrease in the incidence of oxalate formation, metabolic acidosis, and renal tubule damage when narezode was used to treat EG poisoning, plus the apparent lack of side effects in our patients, supports the addition of this competitive inhibitor to treatment regimens for EG poisoning.
Crystal formation in the renal tubules during the early and late periods were found to be significantly more remarkable in the first 2 groups fed with EG compared with the control group (p<0.
rebaudiana natural products exert an inhibitory effect on monosaccharide transport in the intact rat liver, as is the case for phlorizin and phloretin in the renal tubules (Ishii et al.
Leptospires colonize renal tubules of a diverse array of mammalian reservoirs which explains the occurrence of leptospirosis in different contexts such as urban outbreaks after floods (due to rat infestation), rural disease in Southeast Asia (transmitted by field mice) and as an occupational disease for those who deal with farm and domestic animals.
Effect of diabetes and insulin on the maximum capacity of the renal tubules to reabsorb glucose.
Furthermore since the glomerular and renal tubule epithelial cells are strategically interposed between the extra and intramilieu they are potential targets for numerous nephrotoxic agents and the glomeruli are the first structure of the nephron to come in contact with circulating venom.
To conclude, there can be delayed onset acute renal failure in children following multiple bee stings as a result of direct toxic effect of the venom on the renal tubule, therefore require meticulous monitoring of renal function and follow up at least for a two week period.
This, in turn, triggers renal afferent arteriolar vasoconstriction, reducing blood flow through the glomerulus and renal tubule.
Because dehydrated patients are at highest risk of developing CIN due to a higher concentration of toxic substances in the renal tubule, volume expansion is the mainstay of CIN prophylaxis.
Cystine is excreted through the kidneys, with the epithelial cells of the renal proximal tubules absorbing ~99% of filtered cystine through a high-affinity luminal transport system in the proximal renal tubule, which also carries the dibasic amino acids lysine, arginine, and ornithine.

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