The cells of the proximal tubule reabsorb 60-70% of the volume of the filtrate arriving from the glomerulus. Nutrients such as glucose and amino acids are reabsorbed. Furthermore, different ions are actively reabsorbed by facilitated and co-transport: Na+, K+, Mg2+,
Most of the organic solutes are reabsorbed in the proximal tubule.
What is not true about the function of the proximal tubules?
Extra info: 65% of the filtered sodium is reabsorbed there.