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	K+ transport in the mesonephric collecting duct system of the toad Bufo bufo: microelectrode recordings from isolated ...
		the apical membrane of the everted collecting tubule of aquatic-phase
		The collecting duct system of the amphibian mesonephric kidney
		membrane of the collecting tubule of larval Ambystoma tigrinum.
	jeb.biologists.org /cgi/content/full/205/7/897 (3289 words)

	eMedicine - Duplicated Collecting System : Article Excerpt by: Ali Nawaz Khan, MBBS, LRCP, FRCS, FRCP, FRCR
		Duplicated collecting systems can be unilateral or bilateral and occur in 15% of the population.
		The ureteral bud associated with the future lower pole separates first from the Wolffian duct and the orifice progresses superiorly and laterally as a result of growth of the urogenital sinus.
		Mortality/Morbidity: Most cases of duplicated collecting system are detected incidentally; however, the incidence of ureteropelvic obstruction is increased with duplex kidney, hydronephrosis, and pyelonephritis in patients with complete ureteral duplication.
	www.emedicine.com /radio/byname/duplicated-collecting-system.htm (612 words)

	Spartanburg SC \| GoUpstate.com \| Spartanburg Herald-Journal
		As the urine travels down the collecting duct system, it passes by the medullary interstitium which has a high sodium concentration as a result of the loop of Henle's countercurrent multiplier system.
		Though the collecting duct is normally impermeable to water, it becomes permeable in the presence of antidiuretic hormone (ADH).
		Lower portions of the collecting duct are also permeable to urea, allowing some of it to enter the medulla of the kidney, thus maintaining its high ion concentration (which is very important for the nephron).
	www.goupstate.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=nephron (691 words)

	Kidney - Wikipedia, the free encyclopedia
		Part of the urinary system, the kidneys filter wastes (especially urea) from the blood and excrete them, along with water, as urine.
		The renal pyramids, which are actually openings of the collecting ducts, can be observed in the human renal medulla.
		97.9% of the water in the filtrate enters the convoluted tubules and collecting ducts by osmosis.
	en.wikipedia.org /wiki/Kidney (1753 words)

	Search Results for "Collecting duct system"
		These three collecting trunks frequently open separately in the angle of union of the two veins.
		...in the various organs and tissues; (2) of an elaborate system of collecting vessels which conduct the lymph from the capillaries to the large veins of the neck at...
		They form from four to eight collecting trunks which ascend with the spermatic veins in the...
	www.bartleby.com /cgi-bin/texis/webinator/sitesearch?FILTER=&query=Collecting+duct+system (169 words)

	Expression of the MUC 6 Mucin Gene in Development of the Human Kidney and Male Genital Ducts -- Reid and Harris 47 (6): ...
		of the MUC 6 gene in the epithelium of collecting ducts in the
		the collecting duct epithelium and the surrounding mesenchyme.
		and differentation of the kidney collecting duct system.
	www.jhc.org /cgi/content/full/47/6/817 (1927 words)

	Nephrotoxicity associated with exposure to chemicals, principles and methods for the assessment of (EHC 119, 1991)
		The medulla 58 3.3.4.1 The loops of Henle 3.3.4.2 Collecting ducts 3.3.4.3 The distal tubule 3.3.4.4 The countercurrent multiplier system and urine concentration 3.3.4.5 The interstitial cells 3.4.
		The high osmolality is a consequence of the differential permeability of the limbs of the loops of Henle and the collecting ducts to water and ions.
		In the absence of ADH the collecting duct is thought to be impermeable and relatively little water is reabsorbed from it.
	www.inchem.org /documents/ehc/ehc/ehc119.htm (14009 words)

	Cecil Textbook of Medicine : />
		The inner medullary collecting duct (IMCD) is subdivided into two regions: the initial IMCD, located in the outer third of the inner medulla, and the terminal IMCD, situated in the distal two thirds of the inner medulla (see Fig.
		In all segments of the collecting duct, the osmotic water permeability is controlled largely by vasopressin.
		The cortical and outer medullary segments of the collecting duct are largely impermeable to urea in the presence and absence of vasopressin.
	www.merckmedicus.com /ppdocs/us/common/cecils/chapters/111_014.htm (935 words)

	Should You Get Your Heating Ducts Cleaned? \| CMHC (Site not responding. Last check: 2007-11-04)
		A hot air furnace heats and distributes air through its ducting system.The ducts are usually made of sheet metal and are most obvious in your basement, where they hang from the floor joists.The return, or cold air, ducts bring air to the furnace, usually collecting it centrally in the house.
		Duct cleaning may be justifiable to you personally for that very reason: you may not want to have your house air circulated through a duct passage that is not as clean as the rest of the house.
		CMHC research showed that return air ducts, which are relatively big and have slow moving air, are generally far dirtier than the supply ducts.You should be able to accomplish much of the return air duct cleaning with a household vacuum cleaner after removing the register grill.
	www.cmhc-schl.gc.ca /en/burema/gesein/abhose/abhose_ce29.cfm (1230 words)

	Ventilation hygiene inspection, air duct cleaning equipment
		Regardless of the filters in the ventilation system, some particulate contaminants from the outdoor air will enter the system and accumulate on the inner surfaces of the ventilation equipment or flow with the incoming air into the ventilated spaces themselves.
		The dirt that collects in ventilation equipment and on duct walls and in various heat recovery, refrigerating, humidifying and air distribution equipment may act in humid conditions as a fertile soil for microbes.
		Incoming air ducts should be cleaned at 5-year intervals when the dust concentration is greater than 2.0 g/m2 in class 1, and greater than 5.0 g/m2 in class 2.
	www.lifa.net /en/prod_ven.asp (906 words)

	Ginjal - Wikipédia
		Fluid flows from the distal convoluted tubule into the collecting duct system, which consists of:
		The site where the ascending loop of Henle touches the afferent arteriole, is called the juxtaglomerular apparatus.
		Fluids become more concentrated along the tubules and ducts to form urine, which is then drained into the bladder via the ureter.
	su.wikipedia.org /wiki/Ginjal (1059 words)

	Ducting Design Tips For Ductwork Do-It-Yourselfers from KB Duct
		In this system, we are using openings of 4”, 6”, and 8”.
		In most systems, the dust portal of the machine is measured and used as a ‘given’.
		The size of duct ‘A’ is of course 4” because the CFM in the system is constant until the next branch at which point the 6” line feeds into the system.
	www.kbduct.com /ducting_designtips.shtml (291 words)

	K+ transport in the mesonephric collecting duct system of the toad Bufo bufo: microelectrode recordings from isolated ...
		K+ transport in the mesonephric collecting duct system of the toad Bufo bufo: microelectrode recordings from isolated and perfused tubules -- Møbjerg et al.
		The cellular boundaries in collecting ducts appear sharper under the light microscope when compared to collecting tubules.
		(A) Isolated and perfused ramification of collecting ducts.
	jeb.biologists.org /cgi/content/figsonly/205/7/897 (575 words)

	Industrial System - New Dust Collecting (Site not responding. Last check: 2007-11-04)
		The heating system is not most efficiently designed to heat the uncommonly cold day (in that case system will be too expensive); rather it heats for the lowest average day.
		If this system were implemented in all these factories, savings in electric costs alone would total $2,764,450,000, or roughly the value of the power output of twenty major power plants.
		The described system is neither a "miracle" nor a "perpetual-motion machine", but just the combination of motorized blast gate and the latest industrial PLC control system.
	www.ecogate.com /Sujata/IndustrialNewDust.htm (1778 words)

	Kidneys and regulation of water and inorganic ions - The Human Physiology
		Protein free fluid from glomerulus enters Bowman's space and is drained by the proximal tubule which leads to the descending limb of loop of Henle, from where the fluid goes to the ascending limb and then to the distal convoluted tubule.
		The fluid then flows into the collecting duct system, comprised of the connecting tubule, followed by the cortical collecting duct and the medullary collecting duct.
		Medullary collecting ducts from numerous nephrons merge and drain into the renal pelvis, which is continuous with the ureter.
	www.biology-online.org /9/15_kidneys_inorganic_ions.htm (1975 words)

	Collecting duct-specific gene inactivation of {alpha}ENaC in the mouse kidney does not impair sodium and potassium ...
		Collecting duct-specific gene inactivation of {alpha}ENaC in the mouse kidney does not impair sodium and potassium balance -- Rubera et al.
		In vitro in the Xenopus oocyte expression system, the
		Stokes, J.B. Ion transport by the cortical and outer medullary collecting tubule.
	www.jci.org /cgi/content/full/112/4/554 (6258 words)

	Publications, Mark A Knepper, MD, Senior Investigator and Chief, Renal Mechanisms Section, LKEM, Division of Intramural ... (Site not responding. Last check: 2007-11-04)
		Decreased abundance of collecting duct aquaporins in post-ischemic renal failure in rats.
		The vasopressin-regulated urea transporter in the terminal collecting duct of the mammalian kidney.
		Inhibition of urea transport in inner medullary collecting duct by phloretin and urea analogs.
	dir.nhlbi.nih.gov /labs/lkem/staffpages/knepperm/publications.asp (5560 words)

	Virtual Hospital: Department of Radiology Short Clerkship, 74:006: Lecture: Young/El-Zein
		The collecting duct system terminates peripherally in breast lobules; the secretory units of the breast during lactation.
		The terminal ducts, comprising the breast lobules, are lined by a single layer of low cuboidal epithelium as are many of the smaller ducts.
		The breast lobules and collecting duct system compromise the epithelial portion of the breast which, when mature, accounts for less than 10% of the total volume.
	radiology.uiowa.edu /Radshortclerkship/RadShortClkship/LectureNotes/Young-El.htm (1745 words)

	Urinary System Review (Site not responding. Last check: 2007-11-04)
		General Characteristics System that filters blood via tissue interface between circulatory system and external environment.
		Na/K bal: occurs in DCT (responds to cues from system)
		Regulation is via collecting duct cells, responding to ADH.
	bms.brown.edu /curriculum/b189/urinary.htm (343 words)

	NU570: Digital Library: Microscopic Anatomy Overview (Page 3 of 3) (Site not responding. Last check: 2007-11-04)
		The branching duct system of the post-pubertal breast consists of approximately 20 lobes that are radially distributed around the nipple.
		The parenchyma of the breast consists of ducts and lobules lined by a glandular epithelium (E), with a surrounding extralobular stroma (S).
		The nephron is the architectural unit of the kidney and includes the glomerulus and its tubule, which empties into a common collecting duct system.
	jeffline.tju.edu /Education/dl/NU570/library/ma3.html (1239 words)

	Elevation of basolateral K+ induces K+ secretion by apical maxi K+ channels in Ambystoma collecting tubule -- Stoner ...
		That the apical membrane of amphibian collecting tubule
		The basolateral saline of the collecting tubule on
		saline was used to mimic a hyperkalemic condition on the basolateral surface of the collecting tubule.
	ajpregu.physiology.org /cgi/content/full/276/2/R616 (3220 words)

	Protein Kinase A Is a Negative Regulator of Renal Branching Morphogenesis and Modulates Inhibitory and Stimulatory Bone ...
		ureteric bud (and its derivative collecting ducts) (1).
		We have demonstrated the effect of PKA on collecting duct formation at a morphogenetic level.
		The spatial and temporal patterning of the renal collecting system is precisely controlled (1).
	www.jbc.org /cgi/content/full/274/37/26305 (6342 words)

	ccrenal (Site not responding. Last check: 2007-11-04)
		The efferent capillary is a portal system leading to the peritubular capillary, which then leads to the interlobular vein, or (in nephrons near the medulla), to the vasa recta leading into, and back from, the medulla, and then to the vein.
		The primary purpose of loop is adjust solute/water ratio to prepare for regulation in collecting duct.
		Phosphate buffer system is influenced by reabsorption of Phosphate in proximal tubule, but is in equlibrium with Na and H, and plays role in DT and CD system to achieve final acidification.
	socrates.berkeley.edu /~alanburr/physiol/webcc99/ccrenal.htm (2277 words)

	Pelvic Embryology Questions (Site not responding. Last check: 2007-11-04)
		What renal malformation is probably due to faulty development of the collecting duct system, but may be due to failure of the metenephic tissue and branches of the ureteric bud to become confluent?
		The superior uretic bud (uteters) and inferior mesonephric duct (vas deferens) are reabsorbed into the bladder wall and the space between them is known as the trigone in the adult.
		The paramesonephric duct contributes little to the male but it is still important to know its two remnants because they can become cystic.
	condor.bcm.tmc.edu /~dd037020/grunk.html (1322 words)

	Emergency Clinical Guide Presents Nephrology
		From the glomerulus, the fluid travels through the proximal convoluted tubule, the loop of Henle, the distal convoluted tubule, and finally into the collecting duct system (which becomes the ureter and so on).
		Renal Artery Pressure: Low BP systemically is obviously reflected by low renal artery pressure, and the kidney responds to low pressure by releasing renin, which is intended to eventually raise pressure.
		Furthermore, its reabsorption is aided by ADH - when ADH influences the collecting ducts to reabsorb water, they also tend to reabsorb urea.
	www.anisman.com /ecg/kidneys.htm (2526 words)

	Duct Cleaning
		The process loosens build-up inside the air ducts then quickly vacuums the dust up before it has a chance to reattach to the side of the duct.
		Every duct is cleaned from each register to the furnace, removing contaminates that circulate throughout the duct system and into your home.
		All air ducts and vents are sanitized with an environmentally safe sanitizer commonly used in hospitals and nursing homes.
	www.atempheating.com /ductcleaning.html (385 words)

	Embryonic Renal Epithelia: Induction, Nephrogenesis, and Cell Differentiation -- Horster et al. 79 (4): 1157 -- ...
		of the collecting duct system, and it was demonstrated for the
		growth of the collecting duct in organ culture (291).
		Ureteric duct with ureteric buds is microdissected and transferred on collagen matrix in culture dish.
	physrev.physiology.org /cgi/content/full/79/4/1157 (8638 words)

	Aquaporins in the Kidney: From Molecules to Medicine -- Nielsen et al. 82 (1): 205 -- Physiological Reviews
		AQP2 (green) is abundant in the apical and subapical part of collecting duct principal cells, whereas AQP3 (red) and AQP4 (purple) are both present in the basolateral plasma membrane of collecting duct principal cells.
		AQP2 (82) is abundant in the apical plasma membrane and apical vesicles in the collecting duct principal cells (169) (Figs.
		outer medullary collecting duct, is regulated by vasopressin (59).
	physrev.physiology.org /cgi/content/full/82/1/205 (10063 words)

	The Cell Adhesion Molecule L1 Is Developmentally Regulated in the Renal Epithelium and Is Involved in Kidney Branching ...
		In addition to its persistent expression in the CD system, L1 is now detected in mesenchyme derivatives where it is first expressed in the distal segment of S-shaped bodies (arrows, I) hooking up with the terminal ampulla.
		In more mature nephrons, L1 is detected in the connecting segment (arrows) and the collecting duct (J) and is also visible in the medullary region in elongating tubules that form the loops of Henle (arrows, K).
		In young primary cultures of rabbit kidney cortical collecting duct intercalated cells originate from principal or undifferentiated cells.
	www.jcb.org /cgi/content/full/143/7/2067 (7372 words)

	Darren P (Site not responding. Last check: 2007-11-04)
		It is well established that the collecting ducts reabsorb vast quantities of salt and water.
		We discovered, unexpectedly, that collecting ducts have an intrinsic capacity for salt and fluid secretion, thus harboring a counteractive force to NaCl absorption.
		We are investigating the hypothesis that inner medullary collecting ducts, the last nephron segments in contact with the tubular fluid, make final adjustments to the fluid before it is excreted as urine.
	www2.kumc.edu /ki/wallace.htm (371 words)

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