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thyroid gland uses iodine from food to make two
thyroid hormones: triiodothyronine (T3) and thyroxine (T4). It also stores
these thyroid hormones and releases them as they are needed. The
hypothalamus and the
pituitary gland, which are located in the brain, help
control the thyroid gland. The hypothalamus releases thyrotropin-releasing
hormone (TRH), which stimulates the pituitary gland to release
thyroid-stimulating hormone (TSH). When the hypothalamus and pituitary are
working normally, they sense when:
Disease or tumors of the pituitary gland can affect this
See a picture of
thyroid hormone production.
Thyroid hormones affect every cell and all the organs of the body.
Current as of:
August 7, 2012
Kathleen Romito, MD - Family Medicine & Matthew I. Kim, MD - Endocrinology
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