The LOINC® codes are copyright © 1994-2017, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at https:///license/ . Additional information regarding LOINC® codes can be found at , including the LOINC Manual, which can be downloaded at /downloads/files/
Many hormones and their structural and functional analogs are used as medication . The most commonly prescribed hormones are estrogens and progestogens (as methods of hormonal contraception and as HRT ),  thyroxine (as levothyroxine , for hypothyroidism ) and steroids (for autoimmune diseases and several respiratory disorders ). Insulin is used by many diabetics . Local preparations for use in otolaryngology often contain pharmacologic equivalents of adrenaline , while steroid and vitamin D creams are used extensively in dermatological practice.
Steroid hormone receptors and related receptors are generally soluble proteins that function through gene activation. Lipid-soluble hormones target specific sequences of DNA by diffusing into the cell. When they have diffused into the cell, they bind to receptors (intracellular), and migrate into the nucleus.  heir response elements are DNA sequences (promoters) that are bound by the complex of the steroid bound to its receptor. The receptors themselves are zinc-finger proteins.  These receptors include those for glucocorticoids ( glucocorticoid receptors ), estrogens ( estrogen receptors ), androgens ( androgen receptors ), thyroid hormone (T3) ( thyroid hormone receptors ), calcitriol (the active form of vitamin D ) ( calcitriol receptors ), and the retinoids ( vitamin A ) ( retinoid receptors ). Receptor-protein interactions induce the uptake and destruction of their respective hormones in order to regulate their concentration in the body. This is especially important for steroid hormones because many body systems are entirely steroid dependent.