How does facilitated diffusion work?
Facilitated diffusion works like a gate, the cell membrane acts as the gate keeper. When something that wants to enter a cell reaches a cell membrane and it can not enter via diffusion, a gate will open and allow the molecule to enter. The proteins that sit on the outside of the cell membranes act as the gates. If the same type of molecule needs to leave a cell the gate will open and allow the molecule to leave. Molecules will enter and leave a cell based upon the concentration of that molecule inside of the cell. If there is not enough of a certain molecule inside a cell the gate will open and allow a molecule to enter. If there is too many of a certain molecule the gate will allow some to leave. Relevance to our lives : Our bodies are made up of many cells, and the cell membranes protect our cells from things entering and leaving our cells. They help to provide our cells with the food it needs as energy by allowing important molecules into the cell. Cell membranes also keep out thing
