steroid

In the 1988 Olympic Games in Seoul, South Korea, Canadian sprinter Ben Johnson accelerated out of the blocks in the 100-meter track event and ran into history...See more » In the 1988 Olympic Games in Seoul, South Korea, Canadian sprinter Ben Johnson accelerated out of the blocks in the 100-meter track event and ran into history 9.79 seconds later to capture the gold medal. However, instead of being remembered as the fastest man alive, he will always be recognized as the athlete whose downfall alerted the public to the widespread use of ... In addition to using stimulants, a growing number of athletes and bodybuilders began experimenting with and heavily using anabolic steroids in the second half of the 20th century. Anabolic steroids are derivatives or synthetic models of the male sex hormone testosterone that stimulate muscle growth. By the 1980s, the use of anabolic steroids had spread to members of the ... | Aldosterone steroid hormone secreted by adrenal gland; principal regulator of salt and water balance in human body; plays small role in metabolism of fats, carbohydrates, and proteins; synthesized from corticosterone, a steroid derived from cholesterol; adults produce about 20 to 200 micrograms of aldosterone per day; production of aldosterone regulated by secretion from kidney in ... | Feedback Control of Hormone Secretion from the hormones article The pituitary gland coordinates the activity of the endocrine glands to ensure a hormone balance. A regulatory feedback control system—a push-pull type of operation—controls pituitary output. For example, the pituitary hormones FSH and ICSH act on the gonads to produce their respective steroid hormones. When the concentration of these steroids reaches a certain level in ... | Alzado, Lyle (1949–92). U.S. professional football player Lyle Alzado was admired by fans for his bone-jarring, aggressive playing style but was feared by opponents who faced his 6-foot 3-inch (1.91-meter), 260-pound (118-kilogram) hulking frame. He was a ferocious defensive lineman for the Denver Broncos (1971–79), Cleveland Browns (1979–82), and Los Angeles Raiders (1982–85). Alzado ...See less »