Final answer:
The Distal Convoluted Tubule (DCT) performs reabsorption largely under the influence of the hormone aldosterone, which increases the activity of Na+/K+ ATPase pumps for electrolyte balance and fluid retention.
Step-by-step explanation:
Reabsorption in the Distal Convoluted Tubule (DCT) primarily occurs under the influence of hormones, particularly aldosterone. Aldosterone acts on the DCT and collecting ducts by increasing the number of Na+/K+ ATPase pumps on the basal membrane, which facilitates the movement of Na+ out of the urine, and as a result, allows Cl- to follow due to the negative charge created. This encourages water and solutes to move into the peritubular capillaries and back into circulation. This hormone-driven process is crucial for the fine-tuning of electrolyte balance and blood pressure maintenance.