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Survival and response - Coggle Diagram

- - - - Receptors detect stimulus
      - Made from proteins on the cell surface membrane
      - Receptors communicate with the effectors via the nervous system.
    - - Peripheral
        
        Somatic
        
        Controls the conscious activities
        
        Automatic
        
        parasympathetic
        
        Calms down the rest of the body.
        
        Sympathetic
        
        Flight or fight response
        
        Controls unconscious response.
      - Reflexes
        
        An unconscious rapid body response
        
        Electrical impulses are short lived.
      - Consists of a complex network of neurons
      - Consists of sensory neurons , motor neurons and relay neurons.
  - - - shoots can are positively phototropic whilst roots are negatively phototropic and grow away from light.
    - - Shoots are negatively gravitropic and roots are positive gravitropic and grow downwards.
    - - Growth factors speed up or slow down the growth of plants. IAA is an auxin.
      - Effects of IAA concentrations
        
        Gravitropis
        
        IAA concentrations increase in the shots on the shaded side. The cell will elongate and the shoot will bend towards the light.
        
        IAA concentrations in the roots increase on the shaded side of the root. Growth is inhibited so that the root bends away from the light.
        
        Roots
        
        IAA concentrations increase on the lower side of the shoot and the cells elongate causing it to grow upwards
        
        IAA concentrations