Respuesta :
Answer:
cell membrane
Explanation:
- Materials may move into and out of cells through the cell membrane of a cell. The movement may involve any of the three types of cellular transport, that is active transport, osmosis, or diffusion.
- Active transport involves the movement of materials against a concentration gradient, using energy in the form of ATP.
- Diffusion involves the movement of solute molecules from a region of lower concentration to a region of high concentration through the cell membrane.
- While osmosis involves the movement of water molecules across a cell membrane from a region of low concentration to a region of high concentration.