Quizlet Science vocab 3

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  1. Active transport: The movement of materials through a cell membrane using cellular energy
  2. diffusion: The main methos by which small molecules move across the cell membrane also is the process by which molecules move from an area of lower concentration to higher concentration
  3. osmosis: is the diffusion of water molecules through a selectively permesble membrane
  4. Passive Transport: the movement of materials through a cell membrane without using cellular energy
  5. selectively permeable: some substances can pass throught the membrane while others can't