While glucose can enter cells via facilitated diffusion, this is not the primary method in most situations. Here's why:

* Facilitated diffusion requires a concentration gradient: Glucose often needs to be moved against its concentration gradient, meaning there is already a higher concentration inside the cell.

* Active transport is more common: Cells primarily use active transport (requiring energy) to move glucose into the cell, specifically through glucose transporters (GLUTs). This allows them to maintain a high concentration of glucose inside the cell, even when external levels are low.

Therefore, while glucose can enter by facilitated diffusion, it is not the most common way for cells to obtain this essential energy source.