Cell Membrane Structure

    Subdecks (2)

    Cards (36)

    • What do membranes control?

      What passes through them
    • What do membranes surround?

      • All cells
      • in eukaryotic cells, many of the organelles are surrounded by membranes too
    • What do cell-surface membranes surround?

      cells
    • What are cell-surface membranes?

      Partially permeable membranes which surround cells and are a barrier between the cell and its environment, controlling which substances enter and leave the cell
    • How permeable are cell-surface membranes?
      partially permeable - they let some molecules through but not others
    • How can substances move across the cell -surface membrane?
      by diffusion, osmosis or active transport
    • What do the membranes around organelles do?

      Divide the cell into different compartments - they act as a barrier between the organelle and the cytoplasm
    • Give a detail about the membranes around organelles?

      they are partially permeable and control what substances ENTER and LEAVE the ORGANELLE
    • What is the same for all cell membranes?

      the basic structure of all cell membranes
    • what are all cell membranes composed of?

      Lipids (mainly phospholipids), proteins and carbohydrates (attached to proteins or lipids)
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