BIOL 2114 Lecture Notes - Adrenal Gland, Digestion, Releasing And Inhibiting Hormones
Document Summary
They include natural oils, waxes, and steroids: steroids: any large class of organic compounds with a characteristic molecular structure containing four rings of carbon atoms (three six-membered and one five). They include many hormones, alkaloids, and vitamins: eicosanoids: biologically active lipids with local hormone-like activity (structurally different from steroids). Induce secretory activity (of prior made proteins and lipids) If the hormone is degraded or inactivated, it cannot stimulate a target cell: hormones can be removed from the blood by, degrading enzymes. In the same manner, acetylcholinesterase is degraded (ach): the kidneys, via exertion in the urine, liver enzyme systems. Interaction of multiple hormones at target cells: filtration and deactivation, there are three types of interactions between different hormones if they encounter. Pituitary-hypothalmic relationships: anterior lobe: the anterior lobe of the pituitary is an out pocketing of the oral mucosa, there is no direct neural contact with the hypothalamus, there is a vascular connection, the hypophyseal portal system, consisting of:
