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...systems, DVD players, digital cameras and camcorders, all beckon the shoppers, asking them to take note of recent developments. Similarly, press and TV advertisements, leaflets and Sunday supplement flyers introduce us to ranges of brand new, innovative products. New technology offers the potential for real improvements to our lives – products that make jobs easier,...

...system ‘green’ would label foods with low energy, ‘amber’ for medium energy density and ‘red’ for high energy density. Activity 10 What do you suppose is meant by ‘high energy density’ ? Answer A food with high energy density will make available far more energy for its size (i.e. per portion) than a low-energy-density food. Activity 11 What happens if the...

...systems to be highly flexible. Examples of this flexibility are: the same type of receptor can be coupled to different signalling pathways in different cell types; the signal can be amplified (or damped down) as it travels along the signalling pathway; it can switch on multiple pathways, leading to several cellular responses in diverse regions of the cell; information can...