afferent arteriole definition
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Afferent arterioles The afferent arterioles are a group of blood vessels that supply the nephrons in many excretory systems.They play an important role in the regulation of blood pressure as a part of the tubuloglomerular feedback mechanism.he afferent arterioles are a group of blood vessels that supply the nephrons in many excretory systems.
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- Both arteriole and distal tubule has specialized cells: juxtaglomerular cells (JG) - smooth muscle cells surrounding the afferent and efferent artioles and composed of granules containing renin; these cells act as mechanoreceptors that sense the blood pressure in the arteriole.
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- Remember that the afferent arteriole brings blood to the glomerulus and the efferent arteriole takes blood away from the glomerulus. The efferent arterioles either 1) carry blood to capillaries in the medulla (Vasa recta) or 2) form anastomotic capillaries in the cortex (peritubular plexus). Efferent arterioles of glomeruli in the outer cortex form the peritubular plexus which surrounds proximal and distal tubules. Efferent arterioles of glomeruli in the deeper cortex contribute to the adjacent peritubular plexus and also form the vasa recta which accompany the loop of Henle into the medulla.
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Efferent arteriole The efferent arterioles are blood vessels that are part of the urinary tract of organisms. The efferent arterioles form from a convergence of the capillaries of the glomerulus. They play an important role in maintaining the glomerular filtration rate despite fluctuations in blood pressure.
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Afferent arterioles Afferent arterioles. The afferent arterioles are a group of blood vessels that supply the nephrons in many excretory systems. They play an important role in the regulation of blood pressure as a part of the tubuloglomerular feedback mechanism. The afferent arterioles branch from the renal artery, which supplies blood to the kidneys.
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- The Bowman's capsule empties the filtrate into the proximal tubule that is also part of the nephron. A glomerulus receives its blood supply from an afferent arteriole of the renal circulation. glomerulus receives blood from a single artery called the afferent artery. The afferent artery is a branch of an interlobular artery in the cortex of the kidney. Contraction or relaxation of the artery can affect the pressure of capillaries in the glomerulus, and consequently the filtration of blood.
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afferent Carrying inward to a central organ or section, as nerves that conduct impulses from the periphery of the body to the brain or spinal cord. [Latin afferēns, afferent-, present participle of afferre, to bring toward : ad-, ad- + ferre, to bring; see bher- in Indo-European roots.] af′fer·ent·ly adv.
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What is the function of arteriole? The afferent arteriole in a nephron is a larger diameter then the outgoing efferent arteriole and this increase the blood pressure in the glomerulus capillaries resulting in t … he ultrafiltration of the blood into the Bowman's capsule.
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- Peritubular capillaries. In the renal system, peritubular capillaries are tiny blood vessels, supplied by the efferent arteriole, that travel alongside nephrons allowing reabsorption and secretion between blood and the inner lumen of the nephron.
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- Afferent arteriole: delivers blood to the nephron unit. Glomerulus: a ball of capillaries fed by afferent arterioles; site of filtration; located in the renal cortex area of kidney. Efferent arteriole: takes blood away from the glomerulus. Glomerular capsule: (Bowman’s capsule); surrounds the glomerulus like a cup; it is continuous with the nephron tubule.
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efferent Also describes blood or lymph vessels in which flow is away from some point of reference, e.g. efferent arterioles leaving the glomeruli of the kidney; efferent lymph vessels draining lymph glands. Opposite of afferent.
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ductus arteriosus Definition of ductus arteriosus : a short broad vessel in the fetus that connects the pulmonary artery with the aorta and conducts most of the blood directly from the right ventricle to the aorta bypassing the lungs
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Afferent nerve fiber Afferent is derived from Latin participle afferentem (af- = ad- : to + ferre: bear, carry), meaning carrying into. Ad and ex give an easy mnemonic device for remembering the relationship between afferent and efferent: afferent connection arrives and an efferent connection exits.
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- Definition of arteriole - a small branch of an artery leading into capillaries. Definition of arteriole - a small branch of an artery leading into capillaries. dictionary
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Afferent Arteriole: Definition & Function An afferent arteriole connects the renal artery to the glomerular capillary network in your kidney's nephron, starting the filtering process.It also takes action that controls blood pressure.fferent always means a road IN, while efferent always means the way out. So this arteriole is a connector between the (interstate highway) _renal artery_ and the (residential street) capillaries of a nephron's glomerulus. This is where filtration occurs in your kidney.
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Nephron Composed of a glomerulus and the Bowman's capsule, the renal corpuscle (or Malpighian corpuscle) is the beginning of the nephron. It is the nephron's initial filtering component. The glomerulus is a capillary tuft that receives its blood supply from an afferent arteriole of the renal circulation.The glomerular blood pressure provides the driving force for water and solutes to be filtered out of the blood and into the space made by Bowman's capsule.he glomerulus is a capillary tuft that receives its blood supply from an afferent arteriole of the renal circulation. The glomerular blood pressure provides the driving force for water and solutes to be filtered out of the blood and into the space made by Bowman's capsule.
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- Ductus arteriosus: A short vessel through which blood headed from the heart via the pulmonary artery to the lungs is shunted before birth.
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- The __________ arteriole carries blood into the glomerulus, and the __________ arteriole carries blood away. afferent; efferent. The structure of the glomerular capillaries contributes to the formation of filtrate because __________.
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- The glomerulus is a tuft of small blood vessels called capillaries located within Bowman's capsule within the kidney. Between the capillaries and Bowman's capsule lies mesangium. Blood enters the capillaries of the glomerulus by a single arteriole called an afferent arteriole and leaves by an efferent arteriole.The capillaries are lined by a layer of cells (an endothelium) that has a unique structure, allowing blood components to be filtered, and resulting ultimately in the formation of urine. glomerulus receives blood from a single artery called the afferent artery. The afferent artery is a branch of an interlobular artery in the cortex of the kidney.
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- For instance, if the mean arterial pressure increases, renal autoregulation causes the afferent arteriole to constrict, preventing the pressure increase from being transmitted to the glomerular capillaries, and keeping the GFR from increasing.he figure illustrates the forces that determine the filtration rate. The pressure in the glomerular capillaries, PGC, favors filtration. Opposing filtration is the osmotic pressure due to the blood proteins (πGC) and the hydrostatic pressure in Bowman's space (PBS).
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- The present study was conducted to determine the contribution of calcium release from intracellular stores to afferent and efferent arteriolar responses to Ang II and NE. Experiments were performed in vitro using the blood-perfused, juxtamedullary nephron technique combined with videomicroscopy.
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- Afferent arterioles; Afferent lymphatic vessels; Afferent nerve fibers; Other uses. Afferent couplings, in software, classes in other packages that depend upon classes within a given package; Relative afferent pupillary defect, a medical sign observed during the swinging-flashlight test; See also: Efferent
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Difference Between Afferent and Efferent Arterioles The important thing difference between afferent and efferent arterioles is, the afferent arterioles carry the impure blood to the glomerulus whereas the efferent arterioles take away the pure filtered blood again to the circulatory system.
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afferent afferent. 1  bringing to or leading toward an organ or part, as a nerve or arteriole (opposed to efferent). 2  a nerve carrying a message toward the central nervous system.