Final answer:
The Proximal Convoluted Tubules (PCT) reabsorb water, glucose, amino acids, and sodium ions.
Step-by-step explanation:
The Proximal Convoluted Tubules (PCT) in the renal tubule of the nephron reabsorb several substances, including water, glucose, amino acids, and sodium ions. These substances are absorbed back into the bloodstream to maintain the body's balance of water and electrolytes.