Hormones of the Thyroid and Parathyroid

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Author:
emt-shawn
ID:
83285
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Hormones of the Thyroid and Parathyroid
Updated:
2011-05-02 17:02:06
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Anatomy Physiology
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Chapter 18
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  1. Thyroxine (T4)
    • aka:Tetraiodothyronine(contains 4 iodine ions)
    • Location: Thyroid gland
    • Gland/Cells: Follicular epithelium
    • Targets: Most cells
    • Horomnal Effects: Increases energy utilization, oxygen consumption, growth, and development
    • Regulatory Control: Stimulated by the TSH from the Adenohypophysis
  2. Triiodothyronine (T3)
    • aka:related to T4 but has three iodine ions
    • Location: Thyroid gland
    • Gland/Cells: Follicular epithelium
    • Targets: Most cells
    • Horomnal Effects: Increases energy utilization, oxygen consumption, growth, and development
    • Regulatory Control: Stimulated by the TSH from the Adenohypophysis
  3. Calcitonin (CT)
    • Location :Thyroid gland
    • Gland/Cells: "C"cells, Clear cells
    • Targets: Bones, Kidneys
    • Horomnal Effects: Decreases Ca2+ concentrations in body fluids
    • Regulatory Control: Stimulated elevated blood Ca2+ levels; actions opposed by PTH
  4. Parathyroid Hormone (PTH)
    • Location: Parathyroid gland
    • Gland/Cells: (chief) cells
    • Targets: Bones, Kidneys
    • Hormonal Effects: Increases Ca2+ concentrations in body fluids
    • Regulatory Control: Stimulated by low blood Ca2+ levels; PTH effects enhanced by calcitriol and opposed to calcitonin

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