Particular Purpose: To share with my target audience about a brief history of caffeine, how the human body processes caffeine, and possible side effects of excessive caffeine consumption. Central Idea: Caffeine has been around for hundreds of years and has become used for that energizing results on the body. Introduction
I. It is the night before your chemistry test and you choose to learn three weeks really worth of material in one night. II. When one particular: 30 comes around and you can feel your eyes starting to get heavy, what do you grab to give you that extra strength to keep heading? Is it espresso? Is it a Red Bull? III. So why do these types of drinks support us keep our eyes open very long to get through that last part on burning reactions? IV. The answer is caffeine.
Sixth is v. As students, most of us ingest caffeine on a daily basis, so today I am going to give you the history of caffeine, how a body procedures caffeine, and possible unwanted side effects from increased caffeine ingestion. (Transition: Just before I enter the many influences of caffeine on the body, lets go back in time to determine where caffeine came from. )
I. The appreciation of caffeinated drinks dates back thousands of years. a. What is caffeine anyway?
i actually. Caffeine can be described as naturally occurring compound that forms as an end product of nitrogen metabolism in vegetation. ii. It is found in more than 60 different plants kinds around the world, including coffee beans, tea leaves, and coco beans. b. The wild coffee bean plant originated from Ethiopia and according to Reginald Smith, author of the book As well as of Caffeine, cultivation of caffeine that contain food and beverages from the coffee bean may have started as early as AD575. ” c. Centuries handed before coffee would reach Europe by the 17th 100 years, but then spread uncontrollably to all parts of the earth, including America. d. Coffee was brought to America inside the mid 1600s.
i. At this time, most People in the usa still favored to drink tea, another caffeinated beverage, though coffee properties were being developed all over the country. ii. Coffee would not become Many favorite beverage until the Boston Tea Get together, when People in the usa revolted against Britain's large tax upon tea. (Transition: Now that you know where caffeine came from, let us look at how the body techniques it. ) II. How does that morning cup of coffee wake up you up and give you that added energy to have the day started? a. Very well, caffeine is recognized to boost the effects of neurotransmitters, including dopamine, and serotonin. i. For example , dopamine is a brain chemical known to influence concentration. ii. Dopamine is usually responsible for signaling your brain in the next time to go to sleep, but when caffeine is introduced to the body, this kind of signal is blocked. m. Caffeine as well causes the body to release more adrenaline, which causes faster heart beat, more blood being driven to muscle tissues and bodily organs in your body, and adrenaline tells your liver organ to release sweets into the system. c. The moment caffeine is in the blood stream, it encourages the discharge of more calcium ions, which in turn triggers muscle to contract quicker. d. The professor of nutrition in Tufts School, Susan Roberts, says that, " Research studies broadly doc favorable improvements such as raises in metabolism, increased body fat oxidation, and a perception of increased physical and mental energy. ” i. With all of these energy-boosting effects, it's simple to see why all of us love caffeine so much. 2. Even though caffeine can make all of us feel invincible, consuming too much can have negative effects about our health. (Transition: Lets take a glance at how much caffeine we should be consuming and what could happen whenever we consume too much. ) III. Many persons don't know, but there are gloomy effects of the overuse of caffeine. a. According to the document " Selected Health and Behavioral Effects Relevant to the Use of Caffeine” published inside the Journal of Community Overall health, " More than 80% of adults...