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Topic: Nephron


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In the News (Mon 8 Sep 08)

  
  Highbeam Encyclopedia - Search Results for Nephron
nephron One of the units in the vertebrate kidney that extracts metabolic wastes which are discharged as urine.
The fluid in the Bowman capsule at the start of each nephron is essentially plasma without the large molecules (e.g., proteins).
In humans, the kidneys are two small organs situated near the vertebral column at the small of the back, the left lying somewhat higher than the right.
www.encyclopedia.com /SearchResults.aspx?Q=Nephron   (1132 words)

  
  Nephron - Wikipedia, the free encyclopedia
A nephron is the basic structural and functional unit of the kidney.
Each nephron is composed of an initial filtering component (the renal corpuscle) and a tubule specialized for reabsorption and excretion (the renal tubule).
The loop of Henle is a U-shaped tube that consists of a descending limb and ascending limb.
en.wikipedia.org /wiki/Nephron   (1385 words)

  
 Encyclopedia article: Nephron   (Site not responding. Last check: 2007-10-08)
A nephron is the basic structural and functional unit of the kidney (Either of two bean-shaped excretory organs that filter wastes (especially urea) from the blood and excrete them and water in urine; urine passes out of the kidney through ureters to the bladder).
It is a tiny tubule consisting of a cluster of capillaries called the glomerulus (A small intertwined group of capillaries in the malpighian body; glomeruli filter blood during urine formation), surrounded by a hollow bulb known as Bowman's capsule (additional info and facts about Bowman's capsule).
The longer the nephron, the better it performs its countercurrent exchange (additional info and facts about countercurrent exchange) mechanism involving the loop of Henle in the medulla allows reabsorption of water and salt.
www.absoluteastronomy.com /encyclopedia/n/ne/nephron.htm   (499 words)

  
 Nephron Coloring Sheet
The nephron's primary function is to filter blood, but as you can see from the diagram, this is not a simple process.
The nephron has three major parts: the glomerulus, the Bowman's Capsule, and the tubule (which is further divided into the promimal and distal tubule and the Loop of Henle).
Meanwhile, the blood capillaries that are twisted around the nephron join back to the renal vein, from there the blood travels to the posterior vena cava, eventually reaching the heart where it is oxgenated, but that is a topic for the "Circulatory System".
www.biologycorner.com /bio3/nephron.html   (724 words)

  
 nephron --  Encyclopædia Britannica
The most primitive nephrons are found in the kidneys (pronephros; q.v.) of primitive fish, amphibian larvae, and embryos of more advanced vertebrates.
It is a paired organ consisting of a series of nephrons that filter urine from both the pericardial cavity fluids via openings called nephrostomes and the bloodstream from the glomerulus.
Each nephron is a long tubule (or extremely fine tube) that is closed, expanded, and folded into a double-walled cuplike structure at one end.
www.britannica.com /eb/article-9055299   (611 words)

  
 Nephron
The nephron is the functional unit of the kidney, responsible for the actual purification and filtration of the blood.
About one million nephrons are in the cortex of each kidney, and each one consists of a renal corpuscle and a renal tubule which carry out the functions of the nephron.
The nephron is a filtration system located in your kidney that is responsible for the reaborption of water, salts.
coe.fgcu.edu /faculty/greenep/kidney/nephron.html   (284 words)

  
 Nephron - Information from Reference.com
The nephron is the functional unit of the kidney, responsible for the actual
The basic structural and functional unit of the kidney is the nephron.
The nephron is a tube; closed at one end, open at the other.
www.reference.com /search?q=Nephron&db=web   (160 words)

  
 Hypertension Online Slides - nephron, mesangium, extracellular matrix
The nephron, comprised of the glomerulus (shown in the scanning electron photomicrograph on the top left and in the center of the light micrograph on the bottom left) and the tubules (surrounding the glomerulus in the light micrograph on the bottom left), is the primary functional unit of the kidney.
The architecture of the single nephron units that comprise the kidney facilitates interaction of its perfusion and filtration components and of the molecules produced by each of these components.
The remaining normal nephrons are forced to compensate by increasing filtration rate which, in the presence of increased angiotensin II, increases glomerular capillary pressure and perpetuates this progressive spiral of deteriorating renal function.
www.hypertensiononline.org /slides2/slide01.cfm?q=nephron   (1376 words)

  
 nephron   (Site not responding. Last check: 2007-10-08)
Distribution of two aminotransferases and D-amino acid oxidase within the nephron of young and adult rats.
Plasma vasopressin and cortical nephron function in aging rats.
Sensitivity of the segmental renal arterioles to angiotensin II in the aging rat.
www.arclab.org /node_pages/247.html   (199 words)

  
 Reduced nephron number in adult sheep, hypertensive as a result of prenatal glucocorticoid treatment -- Wintour et al. ...
Low nephron number was associated with grossly enlarged and dilated proximal tubules and greater accumulation of collagen type I and type III in the tubular interstitium and periadventitia of the renal cortical vessels.
This suggests that it is not nephron number, per se, that is the critical factor in the development of hypertension, but the compensations made in the remaining kidney, if the reduction occurs during nephrogenesis.
Our second major finding was that low nephron number was associated with grossly enlarged and dilated proximal tubules and greater accumulation of collagen type I and type III in the tubular interstitium and periadventitia of renal cortical vessels.
jp.physoc.org /cgi/content/full/549/3/929   (4462 words)

  
 Molecular regulation of nephron endowment -- Clark and Bertram 276 (4): 485 -- AJP - Renal Physiology
Nephron development from the epithelial vesicle involves a number of stages.
NEPHRON ENDOWMENT IN HOMOZYGOUS AND HETEROZYGOUS NULL MUTANT MICE
Nephron supply is a major determinant of long term renal allograft outcome in rats.
ajprenal.physiology.org /cgi/content/full/276/4/F485   (6695 words)

  
 Archives of Pathology & Laboratory Medicine: Renal Tumor With Overlapping Distal Nephron Morphology and Karyotype
Although most renal epithelial tumors are derived from the proximal nephron, approximately 10% are believed to originate in the distal nephron.
In view of recent advances in treatment approach, especially for collecting duct carcinoma, further categorization of this nondescript and heterogeneous group of renal cell carcinomas, not otherwise specified, at least by its derivation in relationship to the renal nephron (distal vs proximal), may be of value in the choice of treatment modality.
However, the full spectrum of distal nephron tumors is currently evolving and has yet to be defined and firmly established.
www.findarticles.com /p/articles/mi_qa3725/is_200411/ai_n9461844   (1080 words)

  
 BioEd Online Slides: nephron, kidney, human systems, human anatomy, urine
The functional unit of the kidney is the nephron.
Each nephron is made of a cup-shaped portion called Bowman’s capsule, tubules and a network of capillaries.
As the filtrate passes through the tubule portion of the nephron, materials needed by the body are reabsorbed and the remainder of the filtrate becomes urine.
www.bioedonline.org /slides/slide01.cfm?q=nephron   (324 words)

  
 nephron --  Britannica Concise Encyclopedia - The online encyclopedia you can trust!
Functional unit of the kidney that removes waste and excess substances from the blood to produce urine.
Each of the million or so nephrons in each kidney is a tubule 1.2–2.2 in.
At one end it is closed, expanded, and folded into a double-walled cuplike structure (Bowman's capsule) enclosing a cluster of capillaries (glomerulus).
www.britannica.com /ebc/article-9373244?tocId=9373244   (653 words)

  
 Nephron Endowment and Filtration Surface Area in the Kidney after Growth Restriction of Fetal Sheep -- MITCHELL et al. ...   (Site not responding. Last check: 2007-10-08)
Nephron Endowment and Filtration Surface Area in the Kidney after Growth Restriction of Fetal Sheep -- MITCHELL et al.
Nephron numbers in each group are shown in Figure 1.
in nephron endowment in the twins was accompanied by an increase
www.pedresearch.org /cgi/content/full/55/5/769   (3052 words)

  
 Elements of a Paracrine Tubular Renin-Angiotensin System Along the Entire Nephron -- Rohrwasser et al. 34 (6): 1265 -- ...
A, Immunolocalization of Ang in the nephron of sodium-restricted mice.
A to D, Graphical reconstruction of a microdissected nephron (A) and selected segments of proximal convoluted tubule (B), glomerulus and macula densa (C), and midcortical CNT arcade (D).
H]bradykinin in isolated nephron segments of the rabbit.
hyper.ahajournals.org /cgi/content/full/34/6/1265   (4656 words)

  
 nephron
A human kidney is composed of over a million nephrons.
Each nephron consists of a knot of blood capillaries called a glomerulus, contained in the Bowman's capsule, and a long narrow tubule enmeshed with yet more capillaries.
Waste materials and water pass from the bloodstream into the tubule, and essential minerals and some water are reabsorbed from the tubule back into the bloodstream.
www.tiscali.co.uk /reference/encyclopaedia/hutchinson/m0024292.html   (212 words)

  
 Untitled
Through tubular reabsorption, the nephron will reuptake what it deems as good and therefore, by definition, everything else is waste.
Thus, the kidney does not have to work by a process of identifying what is bad; rather it works by identifying those things that are good for the body.
A process where much of the water and all that is deemed 'good' is reabsorbed from the proximal convoluted tubule, loop of Henle, and distal convoluted tubule.
www.mrs.umn.edu /~goochv/HAP/lectures/kidney/kidney.html   (1329 words)

  
 Karger Publishers
Rather than providing the traditional coverage typical of many speciality journals, this new format accounts for the recurring concern of readers that their specific interests within a field are often diluted to the point of finding little of relevance in such journals.
Those with a broad spectrum of interests or institutions can subscribe to the complete 'Nephron' edition (print, online or both), whereas for individuals who are interested in one specialised area only, the online editions of the subjournals are available separately.
Apart from high-quality, original research 'Nephron' publishes invited minireviews on topics of current interest which are designed to update, to inform clinical practitioners and to provide an educational forum.
content.karger.com /ProdukteDB/produkte.asp?Aktion=JournalHome&ProduktNr=223854&ContentOnly=false   (280 words)

  
 Nephron definition - Medical Dictionary definitions of popular medical terms
Nephron definition - Medical Dictionary definitions of popular medical terms
Nephron: A key unit, both anatomically and functionally, of the kidney.
MedicineNet does not provide medical advice, diagnosis or treatment.
www.medterms.com /script/main/art.asp?articlekey=4532   (73 words)

  
 Sodium and calcium transport pathways along the mammalian distal nephron: from rabbit to human -- Loffing and Kaissling ...
the distal convolution of a superficial rat nephron, from its
NCC and ECaC1 in the distal nephron of rabbit and mouse (unpublished observations).
Dorup, J. Ultrastructure of three-dimensionally localized distal nephron segments in superficial cortex of the rat kidney.
ajprenal.physiology.org /cgi/content/full/284/4/F628   (8354 words)

  
 Nephron - Talk Medical
· Nephron is used to treat severe allergic reactions (anaphylaxis) to insect stings or bites, foods, drugs, and other allergens as well as exercise-induced (idiopathic) anaphylaxis.
Before an emergency occurs, talk to your doctor about the use of Nephron if you are pregnant.
Epinephrine emergency kits are designed for emergency use only and are not a replacement or substitute for immediate medical or hospital care.
www.talkmedical.com /medications/4240/Nephron   (1037 words)

  
 Sodium-Potassium-Adenosinetriphosphatase-Dependent Sodium Transport in the Kidney: Hormonal Control -- Féraille ...
present in the nephron segments on the basis of its sodium and
nephron segments results from their huge Na -ATPase activity: the kinetics of rubidium uptake is fast, and
nephron segments was obtained by measuring the in vitro effect
physrev.physiology.org /cgi/content/full/81/1/345   (7674 words)

  
 Nephron   (Site not responding. Last check: 2007-10-08)
This material is designed to display properly using a frames-capable browser.
of the human nephron, approximately 180 liters of fluid are processed each day.
Once the filtrate is in the proximal convoluted tubule (pct), some water leaves due to the osmotic gradient between it and the efferent
tidepool.st.usm.edu /crswr/nephron.html   (158 words)

  
 Lake Michigan College Human Anatomy 205 - Urinary System
Organization of Nephrons in cortex and medulla regions of kidney
Juxtamedullary nephron has long nephron loop (of Henle).
The longer the nephron loop, the greater the interstitial solute concentration
www.lakemichigancollege.edu /dept/Arts-Sciences/bio/anat/urin.html   (536 words)

  
 News - Nephron Sparing Surgery Controls Cancer, Preserves Renal Function
News - Nephron Sparing Surgery Controls Cancer, Preserves Renal Function
Nephron Sparing Surgery Controls Cancer, Preserves Renal Function
Nephron-sparing surgery helps control renal cancer while sparing kidney function, according to a retrospective study.
www.docguide.com /news/content.nsf/news/A96916BED8821DEC85256C1300469183   (466 words)

  
 Nephron, Eastern Carolina
A nephron (pictured in the box above) is a system of tubules and other structures in the kidney.
Nephrons filter fluid and other products from the bloodstream.
Each kidney contains more than a million nephrons.
www.uhseast.com /122053.cfm   (142 words)

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