What is the best explanation for the microvilli on the apical surface of the proximal convoluted tubule (pct) ?

The microvilli (just like the microvilli in the intestines) in the proximal convoluted tubule of the nephron, functions to increase the surface area of the tubule leading to a more efficient reabsorption process (as the PCT functionally functions to reabsorb solutes such as sodium, potassium, and glucose).