testosterone (tĕstŏs`tərōn), principal androgen, or male sex hormone hormone, secretory substance carried from one gland or organ of the body via the bloodstream to more or less specific tissues, where it exerts some influence upon the metabolism of the target tissue.
..... Click the link for more information. . One of the group of compounds known as anabolic steroids steroids, class of lipids having a particular molecular ring structure called the cyclopentanoperhydro-phenanthrene ring system. Steroids differ from one another in the structure of various side chains and additional rings.
..... Click the link for more information. , testosterone is secreted by the testes (see testis testis (tĕs`tĭs) or testicle
..... Click the link for more information. ) but is also synthesized in small quantities in the ovaries ovary, ductless gland of the female in which the ova (female reproductive cells) are produced. In vertebrate animals the ovary also secretes the sex hormones estrogen and progesterone , which control the development of the sexual organs and the secondary sexual
..... Click the link for more information. , cortices of the adrenal glands adrenal gland (ədrēn`əl) or suprarenal gland
..... Click the link for more information. , and placenta, usually from cholesterol cholesterol (kəlĕs`tərōl')
..... Click the link for more information. . Testosterone is necessary in the fetus for the development of male external genitalia; increased levels of testosterone at puberty are responsible for further growth of male genitalia and for the development and maintenance of male secondary sex characteristics such as facial hair and voice changes. Testosterone also stimulates protein synthesis and accounts for the greater muscular development of the male (see metabolism metabolism, sum of all biochemical processes involved in life. Two subcategories of metabolism are anabolism, the building up of complex organic molecules from simpler precursors, and catabolism , the breakdown of complex substances into simpler molecules, often
..... Click the link for more information. ). For many years, synthetic steroids similar to testosterone have been used by athletes with the goal of improving performance, although recent medical research has shown that these drugs may have a wide range of harmful side effects.

testosterone

Masculinizing sex hormone produced by the testes. It is responsible for the development of the male sex organs and secondary sex characteristics (e.g., facial hair, masculine musculature, deep voice, and male-pattern baldness). Testosterone can be manufactured by modifying other, less expensive steroids. It is used in the treatment of hypogonadism, undescended testes (cryptorchism), and certain cancers.

testosterone

a potent steroid hormone secreted mainly by the testes. It can be extracted from the testes of animals or synthesized and used to treat androgen deficiency or promote anabolism. Formula: C₁₉H₂₈O₂

testosterone [tes′täs·tə‚rōn]

(biochemistry)

C₁₉H₂₈O₂The principal androgenic hormone released by the human testis; may be synthesized from cholesterol and certain other sterols.

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testosterone

testosterone