of the female reproductive system and determines the female secondary sexual characteristics such as breasts development. Progesterone prepares the uterus for pregnancy and prevents further release of eggs after pregnancy.With these two in mind it has resulted in the urge for sex, and it has definitely become a big issue in America. Many precautions have been made in the process of preventing any unwanted births and the cause of disease. Birth control pills and condoms have been used for many years now, but have not totally prevented any of these problems.Steroids- the sexual hormones discussed previously are part of a part a larger class of compounds called steroids, characterized by their 17-carbon-atom, four-ring skeletal structure. Progestin is an example of a steroid used as a drug. Other steroids used as drugs include the adrenocortical steroids and the anabolic steroids.Two drugs adrenocortical steroids are used primarily for potent anti-inflammatory effects. The other is the anabolic steroids are usually synthetic analogs of testosterone, the male sex hormone. Steroids are most of the time looked upon as used in a negative way, but steroids in fact help people with asthma and other diseases that steroids are used for.Cancer and Chemicals that fight it- About 40% of Americans develop cancer in their lifetimes, and about 1 in 5 die from it. Cancer kills about 6 million people worldwide each year. Cancer is a particularly difficult disease to combat because cancer cells are modified form of human cells. Chemotherapy is the administration of drugs, either singly or in combination, over an extended period of time. It uses radiation and can be risky however can be highly effective to eliminate cancer cells.Depressants- Often called tranquilizers or downers, are those drugs that depress or dull the central nervous system. The amount of depression usually depends on the dose of the drug; low of inhibition, sedation, sleep unconsciousne...
