The Principal site of absorption of Sodium is :
A i.e. Proximal convoluted tubuleNormally about 60% of the filtered Na+ is reabsorbed in the proximal tubuleQ.Sodium ReabsorptionPercentageSite60%Proximal tubuleQ (by N a+ - H+ exchange)30%Thick ascending limb (by Na+ - 2C1+ - K+ cotranspo)7%Distal convoluted tubule (by Na+ - Cl- cotranspo)3%Collecting duct. ( ENaC channels)
Proximal convoluted tubule
Distal convoluted tubule
Loop of Henle (thick poion)
Collecting duct