notecards

Long-term regular users of marijuana may become psychologically dependent. They may have a hard time limiting their use, they may need more of the drug to get the same effect, and they may develop problems with their jobs and personal relationships. The drug can become the most important aspect of their lives. http://www.well.com/user/woa/fspot.htm **
 * **What about psychological dependence on marijuana?**

What are the dangers for young people? One major concern about marijuana is its possible effects on young people as they grow up. Research shows that the earlier people start using drugs, the more likely they are to go on to experiment with other drugs. In addition, when young people start using marijuana regularly, they often lose interest and are not motivated to do their schoolwork. http://www.well.com/user/woa/fspot.htm

Marijuana use increases the heart rate as much as 50 percent, depending on the amount of THC. It can cause chest pain in people who have a poor blood supply to the heart - and it produces these effects more rapidly than tobacco smoke does. http://www.well.com/user/woa/fspot.htm
 * How does marijuana affect the heart?**

**How teens smoke marijuana? Contrary to popular belief, most teenagers do not use marijuana. Among students surveyed in a yearly national survey, only about one in seven 10th graders report they are current marijuana users //(that is, used marijuana within the past month)//. Fewer than one in five high school seniors is a current marijuana user ** http://www.nida.nih.gov/MarijBroch/teenpg3-4.html#many

**Does marijuana affect the human reproductive system?** Some research studies suggest that the use of marijuana during pregnancy may result in premature babies and in low birth weights. Studies of men and women may have a temporary loss of fertility. These findings suggest that marijuana may be especially harmful during adolescence, a period of rapid physical and sexual development. http://www.well.com/user/woa/fspot.htm