This increased nerve activity can cause cells to become dependant upon nicotine to function normally. ... The coca plant didn't gain popularity until after the Civil War. ... Cocaine blocks a receiving nerve cell from sending a message back to the sending nerve cell. ... Upon reaching the brain alcohol first depresses the highest brain functions. ... Regular use can decrease testicular function, and lower sperm count. ...

• Word Count: 1357
• Approx Pages: 5
• Grade Level: High School

At this phase there is no going back now because you have already began to need the drug to function. ... Cocaine is mostly an illegal drug that comes from the leaves of a plant called coca. ... The brain's normal function in this case is to chemically convey information to and from the receptors. ... Marijuana is the dried leaves and female flowers of the hemp plant, used in cigarette form as a narcotic or hallucinogen. ... It's main psychoactive ingredient, delta- 9-tetrahydrocannabinol (THC); is what causes euphoria by stimulating brain cells to release the chemical dopamine. ...

• Word Count: 1776
• Approx Pages: 7
• Has Bibliography