TESTOSTERONE

tĕstŏsˈtərōn, principal androgen, or male sex hormone. One of the group of compounds known as anabolic steroids, testosterone is secreted by the testes (see testis) but is also synthesized in small quantities in the ovaries, cortices of the adrenal glands, and placenta, usually from cholesterol. 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). 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.

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The Columbia Encyclopedia, Sixth Edition Copyright© 2004, Columbia University Press. Licensed from Lernout & Hauspie Speech Products N.V. All rights reserved.

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Questia Books and Articles on: Testosterone
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books on: Testosterone  - 1573 results

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1.
Drugs in Sport
Book by David R. Mottram; Routledge, 2003
Subjects: Doping In Sports
...know, is the male sex hormone testosterone, which was first synthesized...and humans soon showed that testosterone possessed both anabolic and...The androgenic actions of testosterone are those actions involving...
2.
Biology of Aggression
Book by Randy J. Nelson; Oxford University Press, 2006
Subjects: Aggressiveness--Physiological Aspects--Handbooks, Manuals, Etc
...1986). Furthermore, changes in testosterone concentrations coincide with the changes...glucocorticoids. Elevated concentra- tions of testosterone are observed in victorious animals...Below is a discussion of the role of testosterone and glucocorticoids in the control...
3.
Gender, Nature, and Nurture
Book by Richard A. Lippa; Lawrence Erlbaum Associates, 2002
Subjects: Gender Identity, Nature And Nurture, Sex Differences (Psychology)
...who has spent years studying the effects of testosterone, notes that testosterone can have paradoxical effects on occupational...military combat. On the other hand, high testosterone levels can lead to imprudent, reckless, and...
4.
Sexual Health for Men: The Complete Guide
Book by Richard F. Spark; Perseus Publishing, 2000
Subjects: Hygiene, Sexual, Men--Health And Hygiene, Men--Sexual Behavior, Physical Fitness For Men, Sex (Psychology)--Health Aspects, Sexual Disorders
...TABLE 13.2 Effect of Massive Doses of Testosterone and Placebo Injections on Body Weight and...Exercise Variable Couch + Placebo Couch + Testosterone Trained + Placebo Trained + Testosterone Body Weight -- Baseline 174.9 181 188...
5.
Encyclopedia of Family Health - Vol. 16
Book by David B. Jacoby, Robert M. Youngson; Marshall Cavendish, 2005
Subjects: Health--Encyclopedias, Medicine, Popular--Encyclopedias
Testosterone causes the larynx to enlarge and the...puberty. When puberty is finished, testosterone stops the growth of the long bones...sometimes occurs during the night. Testosterone also promotes a more A This yutrtb...
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journal articles on: Testosterone  - 907 results

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1.
Testosterone, 5[alpha
Journal article by Bettina Von Der Pahlen, Taisto Sarkola, Kaija Seppa, C.J. Peter Eriksson; Vol. 63, 2002
Subjects: Aggressiveness (Psychology), Alcoholism--Physiological aspects, Cortisone--Physiological aspects, Drinking of alcoholic beverages--Physiological aspects, Men--Alcohol use, Men--Behavior, Testosterone--Physiological aspects
Testosterone, 5 amp;#91;alpha amp;#93...in assessing aggressive behavior. Testosterone, in particular, has been related...have been found to possess higher free testosterone levels compared with less violent controls...
2.
Nonassociative Processes and Place Preferences Conditioned by Testosterone
Journal article by Barbara J. Caldarone, Howard S. Stock, Glenn C. Abrahamsen, Michael L. Boechler, Bruce B. Svare, Robert A. Rosellini; The Psychological Record, Vol. 46, 1996
Subjects: Reinforcement (Psychology)--Research, Testosterone--Research
...and place preferences conditioned by testosterone. by Barbara J. Caldarone , Howard...the primary masculinizing androgen testosterone, are abused by growing numbers of...androgens. Although one study found testosterone propionate effective in conditioned...
3.
Lower Serum Testosterone Associated with Elevated Polychlorinated Biphenyl Concentrations in Native American Men
Journal article by Alexey Goncharov, Robert Rej, Serban Negoita, Maria Schymura, Azara Santiago-Rivera, Gayle Morse, David O. Carpenter; Environmental Health Perspectives, Vol. 117, 2009
Subjects: Native Americans--Health aspects, Polychlorinated biphenyls--Health aspects, Polychlorinated biphenyls--Research, Testosterone--Physiological aspects, Testosterone--Research
Lower Serum Testosterone Associated with Elevated Polychlorinated...between serum concentrations of testosterone in relation to levels of PCBs and...DDE), and mirex, as well as testosterone, cholesterol, and triglycerides...
4.
Effects of Testosterone Replacement Therapy on Sexual Interest, Function, and Behavior in HIV+ Men
Journal article by Glenn Wagner, Judith Rabkin, Richard Rabkin; The Journal of Sex Research, Vol. 34, 1997
Subjects: HIV patients--Care and treatment, Hormone therapy--Physiological aspects, Testosterone--Physiological aspects
Effects of testosterone replacement therapy on sexual interest...Rabkin We describe the effects of testosterone replacement therapy on sexual interest...Endocrine abnormalities such as low testosterone are commonly documented in patients...
5.
Transdermal Testosterone Treatment in Women with Impaired Sexual Function after Oophorectomy
Journal article by Alexander Mckay; The Canadian Journal of Human Sexuality, Vol. 9, 2000
Subjects: Hysterectomy--Drug therapy, Testosterone--Administration and dosage, Transdermal medication--Administration and dosage, Women--Sexual behavior
Transdermal testosterone treatment in women with impaired...et al. (2001). Transdermal testosterone treatment in women with impaired...provide about half of circulating testosterone and many women report impaired sexual...
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magazine articles on: Testosterone  - 913 results

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1.
Testosterone: Key to Masculinity and More
Magazine article by Ken Flieger; FDA Consumer, Vol. 29, May 1995
Subjects: Men's health, Men--Health aspects, Testosterone--Physiological aspects
Testosterone: Key to Masculinity and More. by...might have become ovaries. The hormone testosterone, produced by the testes beginning...becoming female organs and tissue. Testosterone promoted development of the penis and...
2.
Mating Mystery from Testosterone in Birds
Magazine article; USA Today (Society for the Advancement of Education), Vol. 138, June 2010
Subjects: Birds--Sexual behavior, Courtship of animals--Research, Mating behavior--Research, Natural selection--Research, Testosterone--Research
Mating Mystery from Testosterone in Birds. A field study of the relationship between testosterone and natural selection in an American songbird...Charlottesville, report that extreme testosterone production--high or low --puts male...
3.
Testosterone Effects in Women with Low Libido
Magazine article; Nutrition Health Review, 2009
Subjects: Baldness, Breast cancer, Menopause, Testosterone, Women
Testosterone Effects in Women with Low Libido AUSTRALIA...a number of cultures. Transdermal testosterone (in the form of a patch) is not approved...of the fact that previous studies of testosterone and sexual function involved postmenopausal...
4.
Hanging with Antonio: Antonio Sabato Jr. Tells All about Putting His Underwear Model Body Back on the Line as a Mysterious Gay Seducer in the Upcoming Film Testosterone
Magazine article by John Griffiths; The Advocate, August 17, 2004
Subjects: Hensley, Dennis--Works, Moreton, David--Works, Motion picture actors and actresses--Interviews, Movie actors--Interviews, Sabato, Antonio, Jr.--Performances, Screenwriters--Interviews, Testosterone (Motion picture)
...Mysterious Gay Seducer in the Upcoming Film Testosterone. by John Griffiths He obsesses over...is not gay. But he does play gay in Testosterone, the he-done-him-wrong dark...hoping to make a bigger impression with Testosterone, which Moreton and cowriter (and...
5.
Too Much Testosterone: Hormones & Autism Spectrum Disorders
Magazine article; Mothering, March 2008
Subjects: Autism, Mens health, Risk factors, Studies, Testosterone
Too Much Testosterone: Hormones Autism Spectrum Disorders A new study confirms...diagnosed with an ASD have significantly higher levels of serum testosterone, serum free testosterone, percent free testosterone, DHEA, and androstenedione...
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newspaper articles on: Testosterone  - 4125 results

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1.
Testosterone Patch Beats Diabetes (and Boosts Libido!)
Newspaper article; The Daily Mail (London, England), April 6, 2010
Subjects: Diabetes, Diabetes mellitus, Diabetes therapy, Hormones, Testosterone
Testosterone Patch Beats Diabetes (and Boosts Libido...new treatment -- the male hormone testosterone. This was not to improve his libido...because new research shows that giving testosterone can improve some of the symptoms of...
2.
Testosterone Patch Beats Diabetes (and Boosts Libido!)
Newspaper article; The Daily Mail (London, England), April 6, 2010
Subjects: Diabetes, Diabetes mellitus, Diabetes therapy, Hormones, Testosterone
Testosterone Patch Beats Diabetes (and Boosts Libido...new treatment -- the male hormone testosterone. This was not to improve his libido...because new research shows that giving testosterone can improve some of the symptoms of...
3.
Testosterone? Why I Wouldn't Take That; an Expert Says Singer Robbie Williams Could Be Storing Up Health Problems by Having Injections of the Hormone
Newspaper article; The Mail on Sunday (London, England), June 12, 2011
Subjects: Somatotropin, Testosterone, Williams, Robbie--Personal narratives
Testosterone? Why I Wouldnt Take That; an Expert...Williams injects himself twice weekly with testosterone, my heart sank. Robbie visited his...told him that, in fact, he had the testosterone levels of a 100-yearold and should...
4.
Effectiveness of Testosterone Gel Tested
Newspaper article; Daily Herald (Arlington Heights, IL), December 21, 2009
Subjects: Cancer research--Reports, Cancer--Reports, Cancer--Research, Hormones--Reports, Oncology, Experimental--Reports, Testosterone--Reports
Effectiveness of Testosterone Gel Tested. Byline: Mark Roth...Post- Gazette As men age, their testosterone levels naturally drop. But for...study will explore whether applying testosterone gel to the abdomen, torso or upper...
5.
Higher Testosterone May Equal Lower Heart Risks
Newspaper article; Manila Bulletin, October 5, 2011
Subjects: Stroke (Disease)--Reports, Stroke (Disease)--Risk factors, Stroke--Reports, Stroke--Risk factors, Testosterone--Reports
Higher Testosterone May Equal Lower Heart Risks. NEW...men with naturally higher levels of testosterone may be less likely to suffer a heart...and 80s, those with the highest testosterone levels were less likely to suffer...
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encyclopedia articles on: Testosterone  - 23 results

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1.
Testosterone
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
TESTOSTERONE testos t ron, principal androgen...compounds known as anabolic steroids , testosterone is secreted by the testes (see testis...placenta, usually from cholesterol . Testosterone is necessary in the fetus for the development...
2.
Prostate Cancer
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...to the United States. The hormone testosterone is believed to have a role in the development...high dietary fat intake and increased testosterone levels. Prostate tumors are often...sometimes used to decrease levels of testosterone. Very small cancers or slow-growing...
3.
Endocrine System
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...The Sex Hormones The testes produce the male sex hormone testosterone , which controls the development of the male sex organs as...sex characteristics. The pituitary hormone LH regulates testosterone production, and FSH initiates sperm formation in the testes...
4.
Anabolic Steroid
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...an drojen ik, any of a group of synthetic derivatives of testosterone that promote muscle and bone growth. Used to treat uncontrolled...called dehydroepiandrosterone (DHEA), which can convert to testosterone in the body, is available as a dietary supplement without...
5.
Adolescence
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...which in turn stimulate the production of predominantly estrogen in girls, and predominantly testosterone in boys. Estrogen and testosterone are responsible for breast development, hair growth on the face and body, and deepening voice...
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