Facilitated diffusion

Facilitated diffusion is a process that helps substances move across a cell membrane without using energy. It occurs when molecules, like sugars or ions, can't easily pass through the membrane due to their size or polarity. Instead, they use specific proteins in the membrane, called transport proteins, which act like gateways. These proteins help shuttle the molecules from an area of higher concentration to an area of lower concentration, allowing the cell to absorb necessary nutrients and maintain balance. This process is essential for cellular functions and overall health.