___________  percentage of Na+ is reabsorbed from ascending loop of henle via ___________ transporter.: (A) 20, Na+ – H+ exchange, (B) 40, Na+ - K+ - 2Cl– symporter, (C) 30, Na+ – Cl– symporter, (D) 20, Na – K- 2Cl–  symporter
Answer is D. % Na reabsorption
Site
Main mechanism


60 – 70%
PCT
Na+ – H+ exchanger


20 – 25%
Ascending loop of henle 
Na+ – K+ – 2Cl– symporter


10 – 12%
DCT
Na+ – Cl+ symporter


3 – 4%
Collecting duct
ENAC channel