Final answer:
The thyrotropin hormone is known as Thyroid-Stimulating Hormone (TSH), a pituitary hormone that regulates the secretion of thyroid hormones by the thyroid gland.
Step-by-step explanation:
The thyrotropin hormone is also known as Thyroid-Stimulating Hormone (TSH). TSH is a key pituitary hormone that triggers the secretion of thyroid hormones by the thyroid gland. The activity of the thyroid gland, which includes thyroid hormone production like thyroxine (T4) and triiodothyronine (T3), is regulated by TSH. This hormone is released by the anterior pituitary in response to thyrotropin-releasing hormone (TRH) from the hypothalamus. TSH falls into the category of tropic hormones, which influence the function of other endocrine glands.