What is the purpose of reabsorption in the kidney tubule?

Last updated: 8/8/2022

What is the purpose of reabsorption in the kidney tubule? Name 2 pathways whereby water and solutes can be reabsorbed from the lumen of the renal tubule to the blood of the peritubular capillaries. Which pathway is the most commonly used? How does the Na-K pump affect the reabsorption of sodium and water in the renal tubule? Consuming a salty meal would increase / decrease water reabsorption from the filtrate.