EXB 110 Assignment 3

EXB 110 Assignment 3 - Rajdeep S. Kular EXB 110 Assignment...

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Rajdeep S. Kular EXB 110 Assignment 3 Effects of Caffeine and High Energy Drinks on Human Metabolism Caffeine has been consumed by humans for centuries mainly to stimulate the central nervous system to temporarily reduce symptoms of fatigue and restore activeness. Used primarily as a psychoactive stimulant, caffeine has evolved from its consumption by chewing seeds and barks in earlier times to the energy and soft drinks of today. However, coffee still holds the same effects to its consumption as it did centuries ago. These effects include increasing energy, raising alertness, faster reaction time, improving concentration, speeding up metabolism, increasing stamina, and enhancing nutrition. There are a lot of positives and a few negatives effects of caffeine and energy drinks, however, there are a lot of misconceptions about the effects of caffeine. Most of these misconceptions are related to the effects on the human metabolism. Caffeine is highly permeable and fast acting because it crosses through membranes of cells from the first sip or consumption. Caffeine can immediately enter the blood stream through contact with the lining of the lips, mouth, stomach, or any permeable part of the skin. It takes as little as “45 minutes for 99% of the caffeine to be absorbed through these membranes.” (Ballard, 2010) In the human metabolism, caffeine takes between 2.5 to 4.5 hours to reach half life, which is the reason why an average energy drink or caffeine consumption effect lasts only 2 to 3 hours. Caffeine's effect on the body varies from person to person based on things such as age, weight, and medical conditions. That is the reason why some people can have a cup of coffee and go to sleep and other people get that jittery or nervous from the same amount of caffeine. As the metabolic process starts, caffeine in the liver is broken down to theophylline, theobromine, and
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This note was uploaded on 11/02/2010 for the course EXB Exb 110 taught by Professor Aldringomes during the Spring '10 term at UC Davis.

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EXB 110 Assignment 3 - Rajdeep S. Kular EXB 110 Assignment...

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