Which of the Following Hormones are Found Within the Hypophyseal-Hypothalamic

Question

Which of the following hormones are found within the hypophyseal-hypothalamic portal capillaries?
A) Gonadotropins
B) Releasing hormones
C) Catecholamines
D) Mineralocorticoids

Accepted Answer

Releasing hormones, such as GnRH and TRH, are secreted by the hypothalamus and are transported through the hypophyseal-hypothalamic portal capillaries to the anterior pituitary, where they stimulate the release of specific hormones, such as follicle-stimulating hormone and thyroid-stimulating hormone. Gonadotropins and mineralocorticoids are hormones that are secreted by the anterior pituitary and adrenal cortex, respectively, but are not found within the hypophyseal-hypothalamic portal capillaries. Catecholamines, such as epinephrine and norepinephrine, are secreted by the adrenal medulla and are not directly involved in the regulation of anterior pituitary hormone secretion.