Sunday, January 29, 2012

Marijuana Affect the Brain

Scientists have learned how THC acts in the brain to produce its many effects. When anyone smokes weeds, THC rapidly passes from the lungs into the bloodstream, which bring the chemical to the brain and other organs throughout the body. THC is rapidly absorbed through the lungs, reaching the brain within minutes.The peak of euphoria usually happens within 10 to 30 minutes and intoxication can last for up to 4 hours.

THC acts upon specific sites in the brain, called cannabinoid receptors, on nerve cells and influences the activity of those cells.Some brain areas have many cannabinoid receptors (Cannabinoids are a group of terpenophenolic compounds present in Cannabis); others have few or none. The interaction of THC with the brain can cause feelings relaxing and feeling of lightness influence pleasure, memory, thinking, feels good,concentrating and time perception, and coordinated movement.These receptors have effects on some physical and mental activities and short-term memory, coordination, learning and problem solving.

The short-term effects of marijuana can include problems with learning and memory; distorted perception; problem solving and difficulty in thinking ; loss of coordination; and also increased heart rate.Research has shown that, in continuing users, weeds negative impact on learning and memory can last for days or weeks after the acute effects of the drug .As a result, anyone who smokes marijuana every day may be behaving at a suboptimal intellectual level all of the time.

Scientists findings for long-time weed use shows some changes in the brain similar to those seen after long-time abuse of other major drugs.A similar challenge arises in studies of the marijuana effects of chronic marijuana use on brain function. This uncertainty may stem from confounding factors such as other drug use, residual drug effects, or withdrawal symptoms in long-time chronic users.

Saturday, January 21, 2012

How does marijuana ( Weed ) affect the lungs?

Scientists believe that marijuana can be harmful to the lungs because users inhale the unfiltered smoke deeply and keep it in their lungs as long as possible. Therefore, the smoke is in direct contact with lung tissues for long time, which Cause inflammation in the lungs and effects the working process of lungs.And growth of cells are uncontrolled. Marijuana smoke contains some of the same ingredients in tobacco smoke that can cause cancer and emphysema. Many marijuana users also smoke cigarettes, and the combined effects of smoking these two substances ( cigarettes and marijuana ) creates an increased health risk.


Marijuana smoke can contains more cancer-causing agents than tobacco smoke or anything. Examination of human lung tissue that had been exposed to marijuana smoke over a long period of time in a laboratory showed cellular changes called Metaplasia that are considered precancerous. In laboratory test, the tars from marijuana smoke have produced tumors when applied to animal skin. These studies shows that marijuana may cause cancer if used for a number of years.