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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