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Eduncle posted an Question
December 30, 2019 • 17:38 pm 0 points
  • CSIR NET
  • Life Sciences

The different segments of renal tubule (column A) and the mechanism of Na+ transport in the apical membrane of tubular cells (column B) are tabulated below 

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    Eduncle Best Answer

    In proximal tubule, sodium/proton exchanger enables reabsorption of bicarbonate. Glucose is transported alongwith Na+ via Na/glucose symporters.
     In thick ascending loop of henle, Three-ion cotransporter (sodium/potassium/chloride) and the sodium/potassium ATPase, which as before maintains the sodium concentration gradient. Sodium is actively pumped out, while potassium and chloride diffuse down their electrochemical gradients through channels in the tubule wall and into the bloodstream. 
     Approximately 5% of sodium filtered load is reabsorbed in the early distal tubule via sodium-chloride co transporter. Sodium reabsorption in late distal tubule takes place through special channels ENacs

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