Thyroid secretion hormone is secreted by the thyrotrope cells in d anterior pituitary gland

Like other hormones of the anterior pituitary (adenohypophysis), TSH is stimulated by a releasing hormone produced in the hypothalamus. This releasing hormone, TRH (thyrotropin releasing hormone) travels down the pituitary stalk and stimulates the thyrotrope cells there, via the portal circulation of the pituitary.

The Anterior pituitary gland secretes the thyroid stimulating hormone (TSH) this targets the thyroid gland, stimulating the release of thyroid hormones. Thyroid-stimulating horomone(TSH) is secreted by the Pitutary gland( Specifically thyrotrope cells of Anterior pitutary gland). TSH regulates thyroid gland.