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Free research papers and essays on topics related to: androgens

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  • Aging Theories - 1,767 words
    ... ter a certain number of divisions, the clock genes are triggered and may produce proteins responsible for cell destruction (Keeton, 1992, 50). Cellular Aging In 1961, a discovery made by Leonard Hayflick showed that normal, diploid cells from such continually Areplaced@ parts of the body as skin, lungs, and bone marrow, divide a limited number of times. Although the cells stop dividing at the point just before DNA synthesis, they do not die. The longer-lived the species, the more divisions the cells undergo. As the age of an individual increases, the number of potential divisions decreases (Ricklefs and Finch, 1995, 29). This discovery was found using fibroblasts, or cells found in the c ...
    Related: aging, aging process, bone fracture, concise encyclopedia, testosterone
  • Balding Is A Problem That Both Men And Women Alike Dread There - 522 words
    Balding is a problem that both men and women alike dread. There is nothing you can really do to stop it from happening. Each day you loss up to fifty hairs. They are replaced with new ones, but in balding people the hair stops coming back. Probably the most common cause of baldness is the use of antineoplastic drugs. Baldness is also known as alopecia. Alopecia is much more common in men than women. Approximately forty percent of all men have hair loss. Hair loss can result from many things, such as genetic factors, aging, drugs, diet, local skin conditions and diseases that effect the body generally. The most common type of hair loss that affects men is male pattern baldness or MPB. This re ...
    Related: alike, dread, men and women, temporary
  • Biology Molecule - 1,108 words
    ... covalent bond or a glycosiolic link -bond is angular and forms a spiral called an alpha helix -if it branches, amylopectin is formed -cellulose is a 1-4 linkage of beta glucose -this creates a straight strand and not a helix -these bonds are rigid and require special enzymes (cellulase) to break them -the position of the beta glucose molecules alternates Lipids: -humans rarely eat pure lipids -cell membranes are primarily lipid and lipids can easily enter cells, carrying a foods flavor with them -a diet should have less than 30% fat, 55-65% carbs, and 10-15% protein -lipids are important as a source of energy, insulation (adipose tissue), cushions for the internal organs, as a lubricant, ...
    Related: biology, molecule, heart disease, boiling point, blood
  • Hormones - 1,052 words
    Hormones IntroductionHormones are organic substances that are secreted by plants and animals and that function in the regulation of physiological activities and in maintaining homeostasis. They carry out their functions by evoking responses from specific organs or tissues that are adapted to react to minute quantities of them. The classical view of hormones is that they are transmitted to their targets in the bloodstream after discharge from the glands that secrete them. This mode of discharge (directly into the bloodstream) is called endocrine secretion. The meaning of the term hormone has been extended beyond the original definition of a blood-borne secretion, however, to include similar r ...
    Related: growth hormone, hormones, water balance, reproductive system, react
  • Steroid Use - 1,094 words
    Steroid Use In the past three decades, steroids have become a serious problem in the athletic field. The demand for it has increased within recent years and the prices shot up since the mid-1980's. The smuggling of steroids into the United States increases every year. The methods have become easy. Simple methods such as stashing it inside a teddy bear, sneaking it across the Mexican border inside shampoo bottles have worked. These type of steroids are anabolic drugs that build growth hormones that include testosterone, which are the male sex hormones that improve performance. Testosterone in the male is produced mainly in the testes and a small amount is produced in the adrenal. It is synthe ...
    Related: steroid, steroid use, men and women, high blood pressure, personality
  • Steroids - 539 words
    Steroids In the past three decades, steroids has been becoming a serious problem more than ever in the athletic field. Steroids are anabolic drug "to build" growth hormones that include the androgens (male sex hormones) principally testosterone and estrogen and progestogens (female sex hormones). Steroids were first developed for medical purposes. They're used in controlling inflammation, strengthening weakened hearts, preventing conception, and alleviating symptoms of arthritis and asthma. Unfortunately research has shown that steroids have been abused in almost every kind of sport. Although steroids contribute to a muscular body, usage should remain illegal because they physically deterior ...
    Related: anabolic steroids, steroids, using steroids, medical purposes, life span
  • Steroids - 973 words
    Steroids Steroids and Performance Enhancing Supplements The use of performance-enhancing supplements among athletes should be banned from all athletic sports and competition, in that it provides an unfair advantage over other athletes trying to excel naturally. Performance-enhancing drugs are a controversial topic in today's society, which are currently under debate. Performance-enhancing drugs are substances, which are used to stimulate certain areas of the body to make an athlete excel in a certain event. A performance enhancing supplement is defined by Edward Dolan in his book Drugs and Sports as "any substance or method used to enhance athletic performance". The most common form of perfo ...
    Related: anabolic steroids, steroids, side effects, human body, dosage
  • Steroids And Athletes - 1,244 words
    Steroids And Athletes What kind of role model is Mark McGwire? Many people are familiar with his seventy homeruns in one season, but do they know that he has been using androstenedione, a type of steroid that boosts testosterone levels? While it is perfectly legal in the United States and in the major leagues, it sends the wrong health message to athletes of every age. If young adults take androstenedione, or any other steroid, they may regret it for the rest of their lives. Artificially high levels of testosterone have been shown to permanently damage the heart, trigger liver failure, and stunt a teenagers growth (Gorman 21-22). All are too great of a price for any sport. What it all comes ...
    Related: anabolic steroids, college athletes, female athletes, steroid use, steroids, using steroids
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