Cell Transport

• Passive transport


  Does not require the expenditure of energy<|>Moves particles through the concentration gradient<|>Molecules move from high concentration to low concentration
• Simple diffusion


  Movement of molecules and ions across a concentration gradient towards a lower concentration<|>Molecules easily go through the cell membrane and its phospholipid bilayer
• Facilitated diffusion

  Movement of molecules and ions, through a carrier, across a concentration gradient towards a lower concentration<|>Proteins are facilitation or helping things pass (ex. charged ions and glucose)<|>Some are transport proteins (acts as channels, change their shape to get items across, or open and close based on a stimulus) that help molecules or polar molecules that may be too big to cross the membrane on their own
• Osmosis

  Diffusion of particles or molecules across selectively permeable membrane<|>For water to travel at a fast rate through the membrane, it passes through protein channels called aquaporins