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Nervous Control in Humans, When exposed to a stimulus, they generate…

- - - - Sense organs are linked to PNS and contain groups of receptor cells.
      - Peripheral nerves contain sensory and motor neurones
        
        Sensory neurones transmit nerve impulses from sense organs to the CNS
        
        Motor (effector) neurones transmit nerve impulses from the CNS to effectors
        
        Relay neurones make connections to other neurones inside the CNS