collecting tubule


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collecting tubule

[kə′lek·tiŋ ‚tü‚byül]
(anatomy)
One of the ducts conveying urine from the renal tubules (nephrons) to the minor calyces of the renal pelvis.
References in periodicals archive ?
All along the collecting tubule, water permeability is ADH dependent.
We demonstrated that MGP protein is also synthesized during this time and that localization of MGP mRNA was strongest in the developing ureter and collecting tubules on embryonic days 17-19 [4].
The mechanical movement of the mites through the hair follicles and meibomian glands caused severe irritation, the persistent cutting and feeding of the mite on the epithelium of hair follicles and main collecting tubules of the meibomian glands and their secretions, excretions, and somatic debris resulted in inflammation and dilatation of the orifices of the hair follicles and main collecting tubules of the meibomian glands.
Kidneys show subcapsular cysts, representing ectasia of the collecting tubules. In the cross-section, these dilated tubules can be seen in a radial arrangement extending from the calyx to the capsule.
(41) Histologically there is diffuse acute tubular injury accompanied by uric acid crystals located predominantly in the collecting tubules. In formalin-fixed tissue, urate crystals are largely dissolved in processing, leaving behind empty lacunae.
The article should have stated that AVP antagonists decrease water permeability of renal collecting tubules, thereby promoting excretion of retained water and normalizing hypo-osmolar hyponatremia.
Homeostatic control of sodium excretion is achieved via changes in sodium reabsorption in the late distal and collecting tubules. This requires some explanation since more than 90% of the filtered sodium is reabsorbed before the filtrate even reaches these nephron segments.