Transport

• Which part of the cell controls substances moving in and out of it?


  Cell membrane
• Define diffusion 


  movement of substances from a high concentration to a low concentration
• Factors affecting diffusion: 


  •concentrations

  • temperature

  •SA of cell membrane
• Define osmosis 


  The diffusion of water from a dilute solution to a concentrated solution through a permeable membrane
• Define active transport 


  Moves substances from a more dilute solution to a more concentrated solution. This requires energy from respiration