Communication Systems

Descrição

A level Biology Mapa Mental sobre Communication Systems, criado por beccadavies19 em 30-12-2014.
beccadavies19
Mapa Mental por beccadavies19, atualizado more than 1 year ago
beccadavies19
Criado por beccadavies19 quase 10 anos atrás
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Resumo de Recurso

Communication Systems
  1. External Environment
    1. Can be air, water or soil. It can change and put the organism under stress
      1. Slow changes e.g. Season change/global warming
        1. Fast change e.g. Day to night/sunshine to darkness
      2. Detecting changes
        1. High blood sugar levels after a meal
          1. Body releases insulin - hormonal
          2. Smelling delicious food
            1. Mouth waters - nervous
            2. Torch shone in eye
              1. Pupils contract - nervous
              2. Sudden drop in external temperature
                1. Shiver - nervous
              3. Internal Environment
                1. Cells...
                  1. ...do metabolic reactions, use up substrates and produce products e.g. CO2
                    1. CO2 needs excreting
                      1. This means the removal of waste to prevent accumulation in the blood
                        1. CO2 needs excreting as it can build up in tissue fluid ad disrupt enzyme action of cells, and change pH levels
                    2. ...are bathed in tissue fluid which is made from the blood

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