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Encyclopedia > Sex steroid

Sex steroids, also known as gonadal steroids, are steroid hormones which interact with vertebrate androgen or estrogen receptors. Natural sex steroids are made by the gonads (ovaries or testes), by adrenal glands, or by conversion from other sex steroids in other tissues such as liver or fat. The term sex hormone nearly always is synonymous with sex steroid. Steroid hormones are steroids which act as hormones. ... Classes and Clades See below Vertebrates are members of the subphylum Vertebrata (within the phylum Chordata), specifically, those chordates with backbones or spinal columns. ... Androgen is the generic term for any natural or synthetic compound, usually a steroid hormone, that stimulates or controls the development and maintenance of masculine characteristics in vertebrates by binding to androgen receptors. ... Estriol. ... In biochemistry, a receptor is a protein on the cell membrane or within the cytoplasm or cell nucleus that binds to a specific molecule (a ligand), such as a neurotransmitter, hormone, or other substance, and initiates the cellular response to the ligand. ... The gonad is the organ that makes gametes. ... Human female internal reproductive anatomy Ovaries are egg-producing reproductive organs found in female organisms. ... Human male anatomy The testicles, known medically as testes (singular testis), are the male generative glands in animals. ... Grays Fig. ...


Sex steroids play important roles inducing the body changes known as primary sex characteristics and secondary sex characteristics. Primary sex characteristic In biology and medicine, primary sex characteristics are those differences in male and female anatomy which are present at birth. ... A peafowl displays its secondary sexual characteristics (long, colored feathers). ...


The development of both primary and secondary sexual characteristics is controlled by sex hormones after the initial fetal stage where the presence or absence of the Y-chromosome and/or the SRY gene determine development. Look up Sex in Wiktionary, the free dictionary. ... This article or section does not cite its references or sources. ... SRY (Sex-determining Region Y) is a sex-determining gene on the Y chromosome in humans and other primates. ...


In many contexts, the two main classes of sex steroids are androgens and estrogens, of which the most important human examples are testosterone and estradiol respectively. Other contexts will include progestagen as a third class of sex steroids, distinct from androgens and estrogens. Progesterone is the most important and only naturally occurring human progestagen. Testosterone is a steroid hormone from the androgen group. ... Estradiol (17-beta estradiol) (also oestradiol) is a sex hormone. ... Progestagens (also spelled progestogens or gestagens) are hormones which produce effects similar to progesterone, the only natural progestagen. ... Progesterone is a C-21 steroid hormone involved in the female menstrual cycle, pregnancy (supports gestation) and embryogenesis of humans and other species. ...


There are also many synthetic sex steroids. Synthetic androgens are often referred to as anabolic steroids. Synthetic estrogens and progestins are used in oral contraceptive pills. Diethylstilbestrol (DES) is a synthetic estrogen. Chemical structure of the natural anabolic hormone testosterone, 17b-hydroxy-4-androsten-3-one. ... Oral contraceptives are chemicals taken by mouth to inhibit normal fertility. ... Diethylstilbestrol (DES) is a drug, a synthetic estrogen that was developed to supplement a womans natural estrogen production. ...


Sex steroids include:

Androgen is the generic term for any natural or synthetic compound, usually a steroid hormone, that stimulates or controls the development and maintenance of masculine characteristics in vertebrates by binding to androgen receptors. ... Testosterone is a steroid hormone from the androgen group. ... Androstenedione (also known as 4-androstenedione) is a 19-carbon steroid hormone produced in the adrenal glands and the gonads as an intermediate step in the biochemical pathway that produces the androgen testosterone and the estrogens estrone and estradiol. ... Dihydrotestosterone (DHT) is a biologically active metabolite of the hormone testosterone, formed primarily in the prostate gland, testes, hair follicles, and adrenal glands by the enzyme 5α-reductase by means of reducing the Δ4,5 double-bond. ... Dehydroepiandrosterone (DHEA), is a natural steroid hormone produced from cholesterol by the adrenal glands, the gonads, adipose tissue and the brain. ... Chemical structure of the natural anabolic hormone testosterone, 17b-hydroxy-4-androsten-3-one. ... Estriol. ... Estradiol (17-beta estradiol) (also oestradiol) is a sex hormone. ... Diethylstilbestrol (DES) is a drug, a synthetic estrogen that was developed to supplement a womans natural estrogen production. ... Progestagens (also spelled progestogens or gestagens) are hormones which produce effects similar to progesterone, the only natural progestagen. ... Progesterone is a C-21 steroid hormone involved in the female menstrual cycle, pregnancy (supports gestation) and embryogenesis of humans and other species. ... Progestagens (also spelled progestogens or gestagens) are hormones similar in effect to progesterone, the only natural progestagen. ...

See also


  Results from FactBites:
 
Sex steroid - Wikipedia, the free encyclopedia (214 words)
Sex steroids, also known as gonadal steroids, are steroid hormones which interact with vertebrate androgen or estrogen receptors.
Natural sex steroids are made by the gonads (ovaries or testes), by adrenal glands, or by conversion from other sex steroids in other tissues such as liver or fat.
The development of both primary and secondary sexual characteristics is controlled by sex hormones after the initial fetal stage where the presence or absence of the Y-chromosome and/or the SRY gene determine development.
steroid: Definition and Much More from Answers.com (1604 words)
All steroids are derived from the acetyl CoA biosynthetic pathway.
Sex steroids are a subset of sex hormones that produce sex differences or support reproduction.
Steroids and retinoids are both terpenes which are hydrophobic, pass through cell membranes and bind to intracellular receptors.
  More results at FactBites »

 
 

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