- diffusion is the random movement of molecules from the area where there is more of them to an area where there is a few of them without the input of energy.
Process B is facilitated diffusion
- facilitated diffusion is the transport of substances across a cell membrane from an area of higher concentration to a lower concentration with the help of <u>Transport protein</u>
Process C is active transport
- A ctive transport is when an input of energy is required to move materials through a cell membrane .
