This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Renal Tubular Reabsorption and Secretion, Subject name: Physiology
Thick ascending limb of loop of Henle has- 
Select and explain. 
A. Na+ K+ cotransporter, B. Na+Cl- cotronsporter, C. Na+ H+ cotronsporter, D. Na+ K+ 2C1- transporter
D: Na+ K+ 2C1- transporter
Answer: D: Na+ K+ 2C1- transporter 
Explanation: Ans. is 'd' i.e., Na+ K+ 2C1- transporter Na+ reabsorptiono 60-70% in proximal tubule - by Na" - H+ exchange, Na+ - Glucose contransport, Na+ - aminoacid cotransport, Na+ unitransport.o 30% in thick ascending limb of loop of Henle by Na+ - 2C1- - K+ cotransport.o 7% in early distal tubule - Na+ Cl- cotransporto 3% in late distal tubule and collecting duct - via ENaC channelso Na+ is reabsorbed in all segments of nephron except for thin descending limb of loop of Henle.