Co-ordination and Control

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  • Co-ordination and Control
    • Neurones
      • Motor
        • Carry impulses from the CNS to the effector
          • CENTRAL NERVOUS SYSTEM: The brain and spinal cord.
            • Carry impulses from one part of the CNS to another
      • Relay
        • Carry impulses from one part of the CNS to another
      • Sensory
        • Transmits impulses from the receptor to the CNS
    • Receptors
      • Sense Organ
        • Contain specific receptors that respond to specific stimuli
          • Eg. Eyes respond to light.
          • STIMULI: Things that set off a reaction in the nervous system.
      • Groups of cells that can detect change in the environment (stimulius) and produce electrical impulses in response
        • STIMULUS: Any change in the environment that can be detected by receptors.
    • Reflex Action
      • REFLEX ARC: The nerve  pathway for a reflex action
      • A way for the body to quickly respond to a stimulus to minimise damage- the brain is not used.
        • Eg. When a muscle contracts to move the hand away from something hot.
    • Effectors
      • Parts of the body, such as a muscle, that respond to a stimulus
    • Synapse
      • The gap between two neurones where information crosses using neurotr-ansmitters
      • Information  diffuses from one neurone across the synapse which makes the other neurone transmit an electrical  impulse

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