Why does the Proximal convoluted tubule contains brush borders in their apical surface?

The proximal convoluted tubule (PCT) contains brush borders on its apical surface to increase the surface area for absorption. These microvilli enhance the efficiency of reabsorbing essential substances, such as glucose, amino acids, and ions, from the filtrate back into the bloodstream. The increased surface area also facilitates the action of various transport proteins and enzymes necessary for processing the filtrate. Overall, the brush border structure is crucial for the PCT's role in maintaining homeostasis in the body.