renal tubule


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Related to renal tubule: renal tubular acidosis, Proximal convoluted tubule

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 ?
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.
Blood urea nitrogen (BUN) is a measure of renal function: rising levels indicate reduced GFR and slow flow through the renal tubules (allowing more of the urea to be reabsorbed).
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.
5) Such an energy requirement would preclude the rapid transport seen in the renal tubules.
The urinary flow rates throughout the renal tubule sodium handling studies did not differ significantly between the oral Vernonia extract administration and control groups.
2]-Microglobulin is a low-molecular-weight protein that is normally reabsorbed by the renal tubules, and its presence in urine indicates compromised tubular reabsorption function.
17] The RCC marker antigen, a monoclonal antibody directed against a normal proximal renal tubule antigen, is a relatively specific marker for cutaneous metastases of RCC.
Cystatin C possesses most of the properties of an ideal GFR test in that it is produced by all nucleated cells at an apparently constant rate, is freely filtered at the glomerulus, and is then fully destroyed in the proximal renal tubule (4).
A second major advance in understanding RCD/CAKUT pathogenesis has been the explosion in understanding of the molecular composition and function of the renal tubule primary cilium.
endogenously produced at a constant rate, freely filtered in the glomerulus, neither reabsorbed nor secreted in the renal tubule, not extrarenally eliminated) and has been reported to be at least as accurate as the commonly used serum creatinine to detect impaired renal function in various patient groups, including renal transplant patients (6-24).
Figure 3 is an electron micrograph (original magnification x4500) of a renal tubule epithelial cell showing a distinct intranuclear inclusion.
Furthermore, secretion or reabsorption of creatinine by the renal tubule is highly unpredictable, thus leading to under- or overestimation of GFR (2).

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