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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.
How and where does most reabsorption occur in a nephron? The proximal tubule is the site of most reabsorption via glucose transporters (reabsorb 100% of glucose in healthy individuals), approx. 65% Sodium and various other solutes a â¦ re also reabsorbed.eabsorption in a nephron occurs in the Loop of Henle Reabsorption has been addressed to substances which are absorbed back from the nerphrone back in to the blood(capillaries â¦). On other hand Secretion is the absorption of substances from blood.