thyrotrophic releasing hormone

thyrotrophic releasing hormone

a hormone secreted by the neurosecretory cells of the HYPOTHALAMUS which releases THYROTROPHIC HORMONE from the anterior lobe of the PITUITARY GLAND, which in turn causes the release of thyroxine.
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It is classified as congenital, describing a newborn with reduced or very rarely absence of thyroid hormone production; primary, caused by intrinsic defect of thyroid structure; secondary to a pituitary insufficiency; and tertiary from insufficient secretion of hypothalamic thyrotrophic releasing hormone.