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Parathyroid Hormone (PTH)

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Summary

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Key Points

  • Parathyroid Hormone (PTH)
    • Origin: Parathyroid
    • Type: Peptide
    • Trigger: Low blood calcium levels
    • Target: Bones and Kidneys
      • Effect:
        • Stimulates proliferation of osteoclasts
          • Osteoclasts break down bone so that the calcium can be utilized by the body
        • Increases renal calcium absorption
        • Increases calcium uptake in gut
        • Raises blood calcium levels
          • Opposite effect of calcitonin from the thyroid gland