| progestational hormones | A class of sex hormones associated with certain changes in the uterus and vagina during the menstrual cycle. They are necessary for the development of mammary tissue and for the maintenance of pregnancy. (12 Dec 1998) |
|---|---|
| progestational hormones, synthetic | Compounds obtained by chemical synthesis that possess progestational activity, but differ in structure from naturally occurring progestational hormones. (12 Dec 1998) |
| sex hormones | Hormones having oestrogenic (female sex hormones) or androgenic (male sex hormones) activity. (12 Dec 1998) |
| hypothalamic hormones | Hormones isolated from the hypothalamus which exercise control over other organs, primarily the pituitary gland. Well-known members include certain pituitary hormone-releasing hormones and pituitary hormone release inhibiting hormones. Vasopressin and oxytocin which are found in the posterior pituitary may also be secreted by the hypothalamus but are not grouped here (pituitary hormones, posterior). (12 Dec 1998) |
| steroid hormones | Those hormone's possessing the steroid ring system; e.g., androgens, oestrogens, adrenocortical hormone's. (05 Mar 2000) |
| neurohypophysial hormones | Hormones produced in the hypothalamus; e.g., oxytocin, vasopressin. (05 Mar 2000) |
| insect hormones | Hormones secreted by insects. They influence their growth and development. Also synthetic substances that act like insect hormones. (12 Dec 1998) |
| invertebrate hormones | Hormones produced by invertebrates, usually insects, mollusks, annelids, and helminths. (12 Dec 1998) |
| testicular hormones | Hormones produced in the testis. (12 Dec 1998) |
| thymus hormones | Humoral factors secreted by the thymus gland. They participate in the development of the lymphoid system and the maturation of the cellular immune response. (12 Dec 1998) |
| thyroid hormones | Chemical substances made by the thyroid gland which is located in the front of the neck. The thyroid gland uses iodine to make thyroid hormones. Thyroid hormones are essential for the function of every cell in the body. They help regulate growth and the rate of chemical reactions (metabolism) in the body. The two most important thyroid hormones are thyroxine (t4) and triiodothyronine (T3). (12 Dec 1998) |
| tissue hormones | Hormones synthesised by cells other than those in the endocrine system. Compare: endocrine hormones. (05 Mar 2000) |
| endocrine hormones | Hormones produced by the endocrine system. Compare: tissue hormones. (05 Mar 2000) |
| tropic hormones | Trophic hormones, those hormone's of the anterior lobe of the pituitary that affect the growth, nutrition, or function of other endocrine glands. (05 Mar 2000) |
| juvenile hormones | Compounds, either natural or synthetic, which block development of the growing insect. (12 Dec 1998) |