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Encyclopedia > Peritubular capillaries
Artery: Peritubular capillaries
Source Efferent arteriole
Branches Interlobular vein
Dorlands/Elsevier c_06/13477736

In the renal system, peritubular capillaries are tiny blood vessels that travel along side nephrons allowing reabsorption and secretion between blood and the inner lumen of the nephron. The Efferent arterioles are a group of blood vessels that are part of the urinary system of many animals. ... The venae stellatae join to form the interlobular veins, which pass inward between the rays, receive branches from the plexuses around the convoluted tubules, and, having arrived at the bases of the renal pyramids, join with the venae rectae. ... Elseviers logo. ... Nephron of the kidney A nephron is the basic structural and functional unit of the kidney. ... Secretion is the process of segregating, elaborating, and releasing chemicals from a cell, or a secreted chemical substance or amount of substance. ...

Ions and minerals that need to be saved in the body are reabsorbed into the peritubular capillaries through active transport, secondary active transport, or transcytosis. Active transport is the mediated transport of biochemicals, and other atomic/molecular substances, across membranes. ... Transcytosis is the process by which various macromolecules are transported across the interior of a cell. ...

The ions that need to be excreted as waste are secreted from the capillaries into the nephron to be sent towards the bladder and out of the body. Excretion is the biological process by which an organism separates waste products from its body. ... A bladder is a pouch or other flexible enclosure with waterproof or gasproof walls. ...

The majority of exchange through the peritubular capillaries occurs because of chemical gradients, osmosis and Na+ pumps. Osmosis is the net movement of a solvent across a semipermeable membrane from a region of high solvent potential to an area of low solvent potential down a concentration gradient. ...

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  Results from FactBites:
General Biology 2, lecture on Homeostasis (2280 words)
The capillaries in the glomerulus reform and exit the renal corpuscle as an efferent arteriole.
The peritubular capillaries that parallel the loop of Henle are referred to as the vasa recta.
The peritubular capillaries are relatively impermeable to urea.
Permeability of renal peritubular capillaries to neutral dextrans dextrans and endogenous albumin -- Deen et al. 231 ... (296 words)
Permeability of renal peritubular capillaries to neutral dextrans dextrans and endogenous albumin -- Deen et al.
Permeability of renal peritubular capillaries to neutral dextrans dextrans and endogenous albumin
With a compartmental model in which diffusion of dextrans and albumin from capillary lumen to interstitium is opposed by capillary uptake of tubule reabsorbate, these results are interpreted to indicate that connective reflection coefficients for dextrans with radii great than or equal to 36 A and albumin are essentially equal to 1.
  More results at FactBites »



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