Final answer:
The early part of the distal convoluted tubule (DCT) reabsorbs about 10-15 percent of filtered water before the forming urine enters the collecting ducts. This reabsorption process is regulated by hormones such as aldosterone.
Step-by-step explanation:
The early or initial part of the distal convoluted tubule (DCT) reabsorbs about 10-15 percent of filtered water before the forming urine enters the collecting ducts.
This reabsorption process is regulated by hormones such as aldosterone, which increases the amount of Na+/K+ ATPase in the basal membrane of the DCT.
This ATPase helps move sodium ions out of the lumen of the collecting duct, creating a negative charge that promotes the movement of chloride ions out of the lumen into the interstitial space.
Peritubular capillaries then receive the reabsorbed solutes and water, returning them to the circulation.