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Cigarette: Harmful Presence of Nicotine
Many smokers believe that smoking helps to relax, but what actually happens is that nicotine slows muscle movement.
Among its many harms, this substance decreases the activity of the autonomic nervous system (which controls functions such as breathing, blood circulation, temperature control, digestion and the balance of functions throughout the body).
More information about nicotine
Just as alcohol can give the illusion of being stimulating when in fact it is not, so nicotine gives a false impression of relaxation, but what it actually does is leave the individual feeling more inactive.
To better understand how this occurs, we need to understand how our nerve cells (neurons) work.
Responsible for conducting the nerve impulse, the neurons act as follows: For example, when we want to raise the arm, the brain sends a small electrical pulse through the thousands of neurons in the human brain until it finally reaches the arm muscles. .
When the nerve impulse reaches the end of the nerve cell it stops, however, this process generates a special chemistry called a neurotransmitter (neurotransmitters are chemicals produced by neurons whereby they can send information to other cells).
Neurotransmitters move toward a particular muscle region, where they reach muscle cell receptors, which lead to a biological response, which in this case is the act of raising the arm.
What nicotine does is interfere with this process by blocking the actual neurotransmitters, because their molecules have a shape very similar to that of neurotransmitters, so they can address receptors very easily; however, they will only pass half the information sent by the brain.
Result: The person will still continue to raise their arm, but will no longer do so easily because they will need to make a greater effort than they would without nicotine interference.
One of the symptoms of nicotine withdrawal is anxiety and nervousness, which occur due to the increase in nerve impulses sent by the brain as a result of the interference generated by it, as nicotine transmitted only half of the information sent by the brain. , it started sending stronger nerve impulses. Thus, even in the example of the arm, the person did not have to make so much effort to lift it.
It is important to emphasize that the restlessness generated in those who quit smoking occurs due to the absence of nicotine, because without it, the muscles will again receive the complete information from the brain, thus responding more easily and with more energy.
People who quit smoking also often complain about an increase in irritability, but what many do not even realize is that the absence of nicotine also makes them happier and more satisfied. The fact is that when you quit smoking, all emotions get more intense, not just bad ones.