Transport of Nutrients:

• Describe the process of diffusion, including examples
• Explain how diffusion is affected by different factors
• Define and explain "surface area to volume ratio", and how this relates to single-celled and multicellular organisms (inc calculations)
• Explain how the effectiveness of an exchange surface can be increased, inc examples of adaptations for small intestines, lungs, gills roots & leaves
• Describe the process of osmosis (inc calculation of water uptake & percentage gain and loss of mass of plant tissue)
• Required practical 3: investigate the effect of a range of concentrations of salt or sugar solutions on the mass of plant tissue
• Describe the process of active transport, including examples - gut and roots
• Explain the differences between diffusion, osmosis and active transport