PSY290H5 Chapter Notes - Chapter 13: Anterior Pituitary, Posterior Pituitary, Pituitary Stalk
Document Summary
Main classes: androgens, like testosterone, and estrogen, like estrodiol. Ovaries and testes also produce a 3rd class of hormones called progestins, like progesterone, which prepares the uterus and breasts for pregnancy, in men function is unclear. Master gland because most of its hormones are tropic hormones. Two glands: posterior pituitary: dangles from the hypothalamus on the end of the pituitary stalk, anterior pituitary: master gland; begins as a tissue on the roof of the mouth, migrates upwards beside the posterior. Female gonadal hormones are cyclic; male gonadal hormones are steady. Visual input to nervous system controlling release of tropic hormones from anterior pituitary. Thyrotropin-releasing hormones, from pigs and sheep, triggers the release of thryotropin from anterior which in turn stimulates the release of hormones from the thyroid gland. Regulation by neural signals: all endocrine glands, except anterior pituitary, are directly regulated by signals from nervous system.
