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Calcitonin

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Summary

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Key Points

  • Calcitonin
    • Origin: Thyroid
      • Made from the C-cells of the Thyroid
    • Type: Protein Hormone
    • Trigger: High blood calcium levels
    • Target: Bone 
      • Decreases osteoclast activity
        • Osteoclasts break down bone to move calcium into the blood, so lower osteoclast activity means lower blood calcium
    • Target: Kidneys
      • Increase calcium excretion
    • Effect: Lowers blood calcium levels