Top of the page. Thyroid Hormone Production and Function. Overview The thyroid gland uses iodine from food to make two thyroid hormones : triiodothyronine T3 and thyroxine T4.
When the hypothalamus and pituitary are working normally, they sense when: Thyroid hormone levels are low, so they secrete more TRH and TSH. This stimulates the thyroid to make more hormones. This reduces hormone production by the thyroid.
How do thyroid hormones work? They: Control the rate at which your body burns calories your metabolism. This affects whether you gain or lose weight. Can slow down or speed up your heartbeat. Thyroid-releasing hormone TRH from the hypothalamus stimulates TSH from the pituitary, which stimulates thyroid hormone release.
As blood concentrations of thyroid hormones increase, they inhibit both TSH and TRH, leading to "shutdown" of thyroid epithelial cells. Later, when blood levels of thyroid hormone have decayed, the negative feedback signal fades, and the system wakes up again. You and Your Hormones. Students Teachers Patients Browse. Human body. Home Hormones Thyroid stimulating hormone.
Thyroid stimulating hormone Thyroid stimulating hormone is produced by the pituitary gland. Its role is to regulate the production of hormones by the thyroid gland. Alternative names for thyroid stimulating hormone TSH; thyrotropin, thyrotrophin What is thyroid stimulating hormone?
How is thyroid stimulating hormone controlled? What happens if I have too much thyroid stimulating hormone? What happens if I have too little thyroid stimulating hormone? When the hypothalamus and pituitary are working normally, they sense when:. See a picture of thyroid hormone production. Author: Healthwise Staff. This information does not replace the advice of a doctor.
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