Final answer:
Hypothalamic hormones that control the function of the pituitary gland originate from the hypothalamus, which sends regulatory hormones to the anterior pituitary to control hormone secretion.
Step-by-step explanation:
Hypothalamic hormones that control pituitary function originate from the hypothalamus. Specifically, the hypothalamus synthesizes and secretes regulatory hormones which include both releasing and inhibiting hormones. These hormones travel through the hypophyseal portal system to the anterior pituitary gland, regulating the secretion of its hormones. The anterior pituitary in turn produces several hormones such as growth hormone (GH), thyroid-stimulating hormone (TSH), adrenocorticotropic hormone (ACTH), among others.