biology unit 3

unit 3

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  • biology
    • movement of molecules in and out of cells
      • osmosis
        • movement of water only
          • with the concentration gradient
        • diffusion
          • gases and liquids
          • with the concentration gradient
      • diffusion
        • gases and liquids
        • with the concentration gradient
      • active transport
        • movement of all states
          • requires energy
            • atp
          • against the concentration gradient
        • osmosis
          • movement of water only
            • with the concentration gradient
    • transport systems in plants and animals
      • animals
        • the blood system
          • plasma
            • transport liquid
          • white blood cells
            • immune system, makes the antibodies and the anti toxins
          • platelets
            • causes the blood to clot at wounds
      • animals
        • xylem
          • transports the food from the leaves to the rest of the plant
        • phloem
          • transports food and solutes to the roots
    • homeostasis
      • the control system
        • controls:
          • water
          • ion content
          • temp
          • blood sugar
            • insulin and glucagon
              • insulin=high
              • glucagon=low
                • makes starch
                  • starch separated by glycagen
        • thermoregulatory centre
          • temp
        • pancreas
          • blood sugar
            • insulin and glucagon
              • insulin=high
              • glucagon=low
                • makes starch
                  • starch separated by glycagen
      • controls waste
        • co2
        • urea
    • humans and their environment
      • biofuels
        • sustainable source of power
        • made from sustainable sources
        • negatives
          • could cause a food shortage due to the farmland the sugar cane would take up
          • doesn't provide as much power as the fossil fuels
      • waste from human activities
        • land fill and recycling
      • deforestation
        • cutting down trees which releases the CO2 stored there
      • food production
        • efficiency of food production
          • battery/factory farming

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