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6.1 stimuli and response - Coggle Diagram

- - - - shoot grows towards light - positive phototropism
      - root grows away from light - negative phototropism
    - - shoot grows away from gravity - negative gravitropism
      - root grows towards gravity - positive gravitropism
    - - root grows towards water - positive hydrotropism
- - - - sensory nervous system (carries impulses towards CNS)
      - motor nervous system (carries impulses away from CNS)
        
        voluntary nervous system
        
        involuntary/autonomic nervous system
    - - spinal cord
      - brain
- - - - involves making sense of information from the receptors
      - largely a function of the brain
    - - the function of receptors receiving information from a stimulus
      - all sensory receptors are:
        
        specific to a single type of stimulus
        
        produce a generator potential by acting as a transducer (converting energy from one form to another)
  - - - found at the end of sensory neurone axons
      - made of many layers of membrane separated by gel
      - the gel between the layers contains positively charged sodium ions
      - the section of axon surrounded by layers of membrane contains stretch-mediated sodium ion channels