Cele mai stupide motive pentru care fumează românii

Colectivitatea te ridica, gasca te coboara.Timp de 28 de ani trebuia sa predam la orele de dirigentie, macar odata pe an despre raul ce-l produce fumatul. Nu sunt fumatoare. Suntem o familie de nefumatori. Tatal meu a fumat mult si a ajuns sa traiasca ultimii 17 ani intr-un scaun cu rotile, avand picioarele amputate.
A.[«Mind Over Matter :Tobacco Addiction.
SOURCE : Government.
How Does Nicotine Act in the Brain ?
Your brain is made up of billions of nerve cells. They communicate by releasing chemical messengers called neurotransmitters. Each neurotransmitter is like a key that fits onto a special « lock » , called a receptor located on the surface of nerve cells. When a neurotransmitter finds its receptor , it activates the receptor ‘s nerve cell.
The nicotine , molecule is shaped like a neurotransmitter called acetylcholine. Acetylcholine and its receptors are involved in many functions , including muscle movement, breathing, heart rate, learning, and memory. They also cause the release of other neurotransmitters and hormones that affect your mood , appetite, memory and more,When nicotine gets into the brain, it attaches to acetylcholine receptors and mimics the of acetylcholine.
Nicotine also activates areas of the brain that are involved in producing feelings of pleasure and reward. Recently , scientists discovered taht nicotine raises the levels of a neurotransmitter called DOPAMINE in the parts of the brain that produce feelings of pleasure and reward. DOPAMINE, which is sometimes called the pleasure molecule, is the same neurotransmitter that is INVOLVED IN ADDICTIONS to other drugs such as cocaine and heroin. Researchers now believe that this change in DOPAMINE may play a key role in all addictions.This may help explain why it is so hard for people to stop smoking. »]
B.[« 15 Cigarettes Equal One DNA Mutation.
By Catharine Paddock, PhD.
Article Date : 18 Dec 2009- 2 :00 PST.
15 cigarettes equal one DNA mutation » captures graphically the enormity of what was discovered when a UK-led team of scientists reported this week haw they cracked the code of two killer cancers : Small cell lung cancer and malignant melanoma. Another compelling revelation was they said they could see « sunlight’s signature » in the DNA mutations of the melanoma cells. A part of a worldwide push by the International Cancer Genome Consortium to unravel the genomes of cancers of major social and clinical importance around the world , scientists at the Wellcome Trust Sanger , Institute in Cambridge , revealed on Wednesday how they found nearly over 23 000 mutations in lung cancer cells and over 30 000 in melanoma cells compared to cells of normal tissue from same individuals. »] SOURCE : Medical News TODAY.