Homeostasis and the human nervous system 

  • Created by: Abc312
  • Created on: 04-06-18 20:34
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  • Homeostasis and the human nervous system
    • Homeostasis
      • Maintaining optimal conditions for cell functions
      • In the human body this includes control of
        • Blood glucose concentration
        • Body temperature
        • Water levels
      • These automatic control systems include chemical or nervous responses
      • All control systems include
        • Receptor cells
          • Which detect stimuli
        • Coordination centers
          • Receive and process information
        • Effectors, muscles or glands
          • Bring about responces
    • Structure
      • Information passes from receptors
        • Along cells (neurones)
          • To the CNS
            • This is the brain and spinal cord
            • This coordinates the response which could be muscles contracting or releasing hormones
      • It travels as electrical impulses
    • Reflex arc
      • Unconscious actions
        • Stop you getting hurt
        • This means they are quicker than usual responces
      • When a stimulus is detected by receptors
        • Impulses are sent along a sensoryneurone
          • Then via a relay neurone in the CNS
            • Through a motor neurone
              • To the effector
      • When the chemicals reach a synapse between the neurones:
        • Chemicals are released at the end of the first neurone
          • They diffuse across the gap
            • This then continues the impulse through the next neurone.

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