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AS biopsychology (Neurones: nerve cells which process and transmit…

- - - - sympathetic branch: stimulates functions involved in the 'fight or flight' response, e.g. increased ventilation and heart rate, dilated pupils, stimulated saliva production
      - parasympathetic branch: slows the functions involved in a 'fight or flight' response
  - - - the impulse then travels to the relay neurone which connects the sensory neurone to the motor neurone
        
        at the synapses between the relay neurone the impulse diffuses across the synaptic cleft in the chemical form of a neurotransmitter
        
        at the post synaptic neurone the neurotransmitter attaches to the receptor molecules
        
        this triggers an electrical impulse along to the motor neuone
        
        this then travels to the effector to produce the response of x
- - - - neurotransmitters in a synaptic vesicle diffuse across the synaptic cleft
        
        they bind to receptor molecules on the CSM of the next neurone
        
        this stimulates the transmission of an electrical impulse
- - - - the ANS changes from resting state as it becomes aroused
        
        this causes the adrenal medulla to release adrenaline
        
        this triggers the symptoms associated with a 'fight or flight' response
        
        once the threat has passed, the parasympathetic system returns the body to resting state