Final answer:
True, cells with microvilli exhibit a more rapid diffusion rate compared to cells without, due to the increased surface area provided by microvilli which facilitate more efficient absorption and secretion processes.
Step-by-step explanation:
True, diffusion is more rapid in cells with microvilli compared to cells lacking microvilli. This is because the presence of microvilli increases the surface area of the plasma membrane, which allows for greater absorption of nutrients and other substances. Microvilli, which can be found on the cells lining the small intestine, are cylindrical extensions of the plasma membrane filled with microfilaments and play a crucial role in absorption. They possess additional enzymes that aid in the digestion of carbohydrates and proteins. Due to their large numbers, with an estimated 200 million microvilli per square millimeter, they substantially expand the absorptive surface area of the intestine, enhancing diffusion. By increasing the surface area, cells facilitate the diffusion process, allowing substances to cross the plasma membrane more efficiently. This is particularly vital for maintaining the efficient operation of cells carrying out rapid absorption or secretion.