1. The first segment of these tubules is the proximal convoluted tubule . 2. Fluid in the filtrate entering the proximal convoluted tubule is reabsorbed into the peritubular capillaries. 3. The urinary pole is where the corpuscle opens into the lumen of the proximal convoluted tubule . 4. The distal convoluted tubule has a different structure and function to that of the proximal convoluted tubule . 5. The renal organic anion transporters OAT1, S2 segment of the proximal convoluted tubules of the kidneys. 6. Erythropoietin is produced by interstitial fibroblasts in the kidney in close association with peritubular capillary and proximal convoluted tubule . 7. Osmotic diuretics have their major effect in the proximal convoluted tubule and the descending limb of Henle's loop. 8. TEM of negatively stained proximal convoluted tubule of Rat kidney tissue at a magnification of ~ 55, 000x and 80 kV with Tight junction. 9. The proximal convoluted tubule of the nephron has protein channels that reabsorb glucose, and others that secrete para-aminohippuric acid ( PAH ). 10. I've also read that PTH inhibits the sodium phosphate co-transporters in the Proximal convoluted tubule -reducing phosphate reabsorption . ..