The Endocrine System

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  • The Endocrine System
    • Thyroxine
      • regulates metabolism
      • controlled by pituitary gland
      • TSH stimulates thyroid gland
      • thyroxine goes up, TSH goes down
    • Adrenaline
      • fight or flight
      • exercise, anxiety, fear
      • increases heart, breathing, blood supply and blood glucose rates
    • Menstrual cycle
      • oestrogen
        • build up of uterus wall
      • progesterone
        • maintains womb lining
      • FSH
        • stimulates egg
      • lining breaks down
        • repair of uterus wall
          • egg released
            • p + o make lining stay thick
              • no egg - cycle restarts
    • Negative feedback
      • controls hormone levels
      • acts like thermostat

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