What does white spots in your nail mean. In a few cases, white spots on fingernails can indicate an underlying infection. [ Source: http://www.chacha.com/question/what-does-white-spots-in-your-nail-mean ] More Answers to What does white spots in your nail mean.
The distal tubule reabsorbs sodium and bicarbonate and secretes potassium. The final segment of the renal tubule is the collecting tubule, which funnels the remaining filtrate toward the renal pelvis for excretion via the URETER as urine. Only water reabsorption takes place from the collecting tubule.ifferent portions of the loop of Henle reabsorb sodium, potassium, chloride, magnesium, calcium, and water. The loop of Henle plays a significant role in the concentration and dilution of the URINE, and is the target of some types of diuretic medications.
The figure at right summarizes water reabsorption along the nephron. Water reabsorption is a passive process: water is reabsorbed by osmosis.In most of the nephron, water reabsorption is unregulated and coupled to solute reabsorption.The ability to excrete urine that is more concentrated than the extracellular fluid (ECF) depends on the creation of a hyperosmotic environment in the medulla.As the collecting duct descends through the medulla, the increasing osmolarity in the interstitial fluid drives water reabsorption.he ability to excrete urine that is more concentrated than the extracellular fluid (ECF) depends on the creation of a hyperosmotic environment in the medulla. As the collecting duct descends through the medulla, the increasing osmolarity in the interstitial fluid drives water reabsorption.