<prompt> Glucose is primarily absorbed from-Proximal convoluted tubuleDistal convoluted tubuleCortical collecting ductMedullary collecting duct  <response>: Ans. is a i.e., Proximal convoluted tubule Important educational pointso 60-70 of glomerular filtrate is reabsorbed in proximal tubule.o Na reabsorption occurs in all segments of nephron excepting descending limb of loop of Henle . 60 60-70 of filtered Na is reabsorbed in proximal tubule. About 30 of filtered Na is reabsorbed in thick ascending limb of loop of Henle. About 7 of filtered Na is reabsorbed in early distal tubules and about 3 of filtered sodium is reabsorbed in late distal tubule and collecting duct.o About 65 60-70 of water is reabsorbed in the proximal tubule and about 15 of water is reabsorbed in the thin descending limb. Remaining 20 of water enters the distal tubules and is absorbed from distal tubule and collecting duct according to the homeostatic requirements of the body, under the control of ADH.o All substances Na, K, HCO3, Cl-, Phosphate, Protein, Glucose, water are maximally absorbed in proximal tubule.o Glucose and amino acids are completely absorbed from proximal tubules along with Na as secondary active transport contransport symport.o H is not absorbed by nephrons anywhere it is only secreted in proximal tubule, late distal tubule and cortical collecting tubules.o Substances which are both secreted and reabsorbed are K, uric acid and creatinine.o On a normal diet maximum solutes are reabsorbed almost completely : Glucose : 100, Aminoacids 100, HCO3-: 100. Water: 99.4, Na: 99.4, Cl-: 99.2, Uric acid : 98, K : 93.3, Urea : 53, and Total solutes : 98.9o Amount secreted per day of different filtered contents are : Na : 150 mEqd, K: 90 mEqd, Cl- : 150 mEqd, Glucose: 0, Amino acid: 0, HCO3 : 0, Uric acid: 5 mmold. Creatinine: 12 mmold, Urea: 410 mmold, Water: 1-1.5 Ld; and total solutes : 700 mOsmd. 