Science >> Biology for Kids. Muscles are how we move and live. All movement in the body is controlled by muscles. Some muscles work without us thinking, like our heart beating, while other muscles are controlled by our thoughts and allow us to do stuff and move around. There are over 650 muscles in the human body.
Send Feedback. Caffeine Free Coke is the same in every way to Coca-Cola classic except it contains no caffeine. There is also caffeine free versions Diet Coke and Coke Zero for those that love the taste of Coke, but don't want the caffeine.
However, why is it in the content of coke? The answer is simple. Caffeine also increases the production of dopamine (as known as the hormone of happiness). Of course, it does not do it in as large quantities as, e.g. amphetamine, but the work is the same. One can of Coca-Cola contains 35 mg of caffeine in there, and Pepsi â almost 40 mg. Is that a big number? Well, one cup of espresso contains 40-80 mg of this substance.