Học tiếng Anh hiệu quả, nhanh chóng: http://www.facebook.com/HocTiengAnhVOA, http://www.voatiengviet.com/section/hoc-tieng-anh/2693.html. Nếu không vào được VOA, xin hãy vào http://vn3000.com để vượt tường lửa. Các chương trình học tiếng Anh miễn phí của VOA (VOA Learning English for Vietnamese) có thể giúp bạn cải tiến kỹ năng nghe và phát âm, hiểu rõ cấu trúc ngữ pháp, và sử dụng Anh ngữ một cách chính xác. Xem thêm: http://www.facebook.com/VOATiengViet
Luyện nghe nói và học từ vựng tiếng Anh qua video. Xem các bài học kế tiếp: https://www.youtube.com/playlist?list=PLD7C5CB40C5FF0531
Health: Luyện nghe nói tiếng Anh qua video: Chương trình học tiếng Anh của VOA: Special English Health Report. Xin hãy vào http://www.voatiengviet.com/section/hoc-tieng-anh/2693.html để xem các bài kế tiếp.
Alcohol drinkers are often cigarette smokers. Scientists have noted the relationship for a long time. But, they have not been able to determine why the two behaviors are connected. Now, a new study may provide some explanation. Mahesh Thakkar is head of research in the Department of Neurology at the University of Missouri’s School of Medicine. He led the study. The Journal of Neurochemistry published the research. Thakkar says alcohol causes sleepiness. He says nicotine, a drug in cigarettes, fights that sleepy feeling. This means the drinker can stay awake and consume more alcohol. At the same time, nicotine is addictive. So, the more a person drinks, the more that person will smoke, and then drink, and so on. The study measured brain activity in rats. The researchers injected the rats with both nicotine and alcohol, and then studied brain activity in the animals as they slept. The researchers found that nicotine cancels out the sleep-causing effects of alcohol. They say the nicotine does this work in the basal forebrain area. Mahesh Thakkar says that is the “reward center” of the brain. This area is responsible for memory and learning. Earlier research has shown that more than 85 percent of American adults who are dependent on alcohol are also dependent on nicotine. The World Health Organization blames alcohol and nicotine use for more than seven million deaths a year.
