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3. Cell Membranes

Structure

  • What are the roles of membranes within cells and at the surface of cells?
  • Do you know that plasma membranes are partially permeable?
  • What is the fluid mosaic model?
  • What are the components of the cell membrane?
  • What effect does temperature have on membrane structure and permeability?
  • Can you explain the term cell signalling?
  • What are membrane-bound receptors and how do they work?

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Transport across membranes

  • What is passive transport, active transport, endocytosis and exocytosis?
  • Can you explain osmosis in terms of water potential?
  • What effects can different water potentials have upon plant and animal cells?
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