The Principal site of absorption of sodium is
Correct Answer: Proximal convoluted tubule
Description: Other than at thin descending limb of the loop of Henle, all other sites of tubule Na+ are reabsorbed by various mechanisms.
- Proximal tubule- 60-70%
Na+- H+ exchange
Na+- Glucose co-transport
Na+- amino acid co-transport
Na+ unitransport
- The thick ascending limb of the loop of Henle - 30%
Na+- 2Cl-- K+ co-transport
- Early distal tubule- 7%
Na+- Cl- co-transport
- Late distal tubule and collecting duct - 3%
ENaC channels
Category:
Physiology
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