<prompt> Answer this question truthfullyWhat is the role of thyrotropin-releasing hormone TRH in the secretion of hormones by the anterior pituitary gland, and which hormone is stimulated by TRH?  <response>: <reason> Thyrotropin-releasing hormone TRH stimulates the secretion of thyroid-stimulating hormone TSH by acting on the thyrotrophs of the anterior pituitary gland. 