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The page below is a sample from the LabCE course Laboratory Assessment of Thyroid Function. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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The Hypothalamus and Regulation of Thyroid Function

The hypothalamus is an almond-sized region of the brain that links the nervous system to the endocrine system. The hypothalamus produces and secretes neurohormones or "releasing hormones" that stimulate or inhibit the secretion of the pituitary hormones.
Related to thyroid function, the hypothalamus produces thyrotropin-releasing hormone (TRH), which stimulates the release of TSH, as well as the hormone prolactin, from the pituitary.