VASCULAR
THE NEPHRON
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Absorption from the collecting ducts
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Active transport of water back into the blood vessels
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Concentration of sodium ions in the medulla
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Response to ADH by varying its permeability to water
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Detailed explanation-1: -The principal function of the loop of Henle is in the recovery of water and sodium chloride from urine. This function allows production of urine that is far more concentrated than blood, limiting the amount of water needed as intake for survival.
Detailed explanation-2: -The loop of Henle is a U-shaped second segment of the renal tubule which is located between the proximal and distal convoluted tubules. It plays a role in the transport of ions and water and the concentration of urine.
Detailed explanation-3: -The loop of henle is a region of the kidney’s nephrons which through active and passive transport of Na+ and Cl-ions lowers the water potential of the kidney’s medulla, allowing greater reabsorbtion of water into the blood at both the loop of henle and collecting duct.
Detailed explanation-4: -Reabsorption of Na+ in the thick ascending limb of Henle’s loop (TAL) occurs through (1) transcellular pathways involving the Na+-2Cl−-K+ cotransporter in the apical membrane and (2) paracellular pathways driven by the lumen positive transepithelial potential difference.