Snith, A. "Effects of Caffeine on Human Behavior." FOOD AND CHEMICAL TOXICOLOGY 40.9 (2002): 1243-55. Web of Knowledge. Web. 13 Mar. 2013. .…
Caffeine is a bitter, white crystalline xanthine alkaloid that is a psychoactive stimulant drug. Caffeine is found in varying quantities in the beans, leaves, and fruit of some plants, where it acts as a natural pesticide that paralyzes and kills certain insects feeding on the plants. It is most commonly consumed by humans in infusions extracted from the cherries of the coffee plant and the leaves of the tea bush, as well as from various foods and drinks containing products derived from the kola nut. In humans, caffeine has a stimulant effect, causing increased amounts of stimulatory neurotransmitters to be released. If the consumption of caffeine is…
Caffeine is found in many plant species, where it acts as a natural pesticide. It is found most commonly in cocoa, tea and coffee, but is also artificially added to some soft drinks such as cola to act as a flavour enhancer. When consumed by humans, caffeine works as a stimulant causing amounts of released neurotransmitters to be increased. High use of caffeine has been related with raised blood pressure, restlessness, insomnia and anxiety which, in the long term, can lead to heart and circulation problems.…
The healthiness of coffee has been a topic of debate for many years. Being one of the most common drinks in the world, people have argued all sorts of positions in regards to its benefits or detriments to their health. Kris Gunnars’ article, “13 Health Benefits of Coffee, Based on Science” argues that coffee is indeed healthy, and provides thirteen reasons why. Jim Dillan’s article, “7 Negative Effects of Coffee & The Healthy Drink You Should Replace it With,” argues the opposite, claiming that coffee is overall harmful to the human body. Although coffee has both positive and negative side effects, Gunners’ article is much more informative, due to its abundance of citations, its large number of well-developed points, and the fact that the article remains consistent with its title.…
The study used for this project is a nursing and health sciences study. One particular healthcare facility is trying to determine if it is a good idea to provide coffee in the waiting room for the patients. There are several other facilities that serve tea, coffee, and water, so this health care facility wants to determine if there is sufficient evidence to show that coffee increases the patient heart rates.…
Daphnia magna are sensitive creatures and therefore they will respond to slight changes in their environment.…
Caffeine is a popular drug that is consumed frequently by children. It is found in common foods like tea, cola and chocolate. Since the children are still growing and developing, the consumption of caffeine may negatively affect physical development.…
Caffeine is a stimulant that leads to temporary alertness. Its purpose is both clear and highly effective. Caffeine can be found in many different available beverages, such as, coffee, tea, soda, and energy drinks of course. Many people do not recognize that caffeine can be toxic at certain dosages, and lead to very serious health risk. Tan-Li Hsu the author of “High on Caffeine: Regulating Energy Drinks” effectively argues the merit of providing warnings for caffeine content on all drink labels that has this highly addictive drug. The demand for the product is increasing all across the United States. Hsu shows the negative influences of caffeine on the everyday life of Americans, especially that of a teenagers. Hsu explains that since the introduction of Red Bull to the American market in 1997 the market has since skyrocketed. Hsu takes up a position alongside Dr. Griffiths and other authors of the John Hopkins study “that energy drink manufacturers should clearly indicate the amount of caffeine on labels and shift marketing efforts away from teenagers.”…
1. Take a small piece of cotton wool, tease it out and place it in the middle of the glass slide. Set up the microscope under a low power setting.…
1. Problem: Does age (grade) or gender influence the results of reading correctly a paragraph consisting of words with jumbled text?…
The experiment aimed to establish a correlation between caffeine intake and the effects it has on both the pulse and respiration rates of an individual after undergoing moderate-intense cardiovascular exercise. Caffeine itself is one of the most heavily consumed drugs on the planet; it is estimated that over 90% of Americans consume caffeine daily (Richard Lovett, 2005, New Scientist iss. 2518) and is the most widely used stimulant in the world (Arcerio, P, Ormsbee, J, 2009, pg. 1). Caffeine stimulates the brain and behaviour, whilst enhances performance at simple intellectual tasks and at physical work that involves endurance (Alcoholism and Drug Addiction Research Foundation, 1991). Coffee is one of the most commonly digested sources of caffeine, and approximately 6g of coffee will contain 180mg of caffeine (University of Sydney School of Biology, 2010). Many studies have taken place to try and examine the effects of caffeine on enhanced endurance for athletes, the study “Performance and metabolic responses to a high caffeine dose during prolonged exercise" (Graham, TE; Spriet, LL (1991) indicated that endurance levels in trained athletes increased by as much as 44% after ingestion of caffeine. This suggests that in our experiment we will perceive an increase in performance in our subjects over the duration and upon completion of the moderately-intense cardiovascular exercise, showing that caffeine will alter the mean change in pulse and respiration to a significant degree…
affeine is a widely used psychoactive drug found in many drinks, such as coffee, tea and cola. Caffeine is naturally present in the leaves and seeds of a variety of plants. Consuming caffeine has significant physiological effects on your body--one being its direct effect on your heart rate.…
Dated back to the 1400s and possible earlier people have been drinking caffeine to include coffee, tea, and chocolate. Today, caffeine is one of Americans’ favorite substance also including the soft drinks and the energy drinks. Per Hart and Ksir (2015) by 2009 Americans were consuming less caffeine; 45 gallons of soft drinks and 23 gallons of coffee when compared with 49 gallons of bottled water per person. Although declining, soft drinks and coffee are still a major part of American’s caffeine consumption, “it is estimated that 80 percent of Americans regularly use caffeine in some form,” (Hart & Ksir, 2015, p. 261). But the Food and Drug Administration (FDA) has not challenged its regulatory oversight on the caffeine use since the 1980s. Adults caffeine use is not of great concern by the FDA because there is no caffeine use disorder, the caffeine is responsible for long-term health benefits, and the caffeine is safe for most adults. Therefore, I consider the FDA current lack of restrictions on caffeine use sufficient and fair.…
Caffeine is the most widely used drug in the world and its usage results in dependency among many users. There are benefits to caffeine as it may have positive effects on learning, but there are also negative effects on physical health. It is well known that many college students ingest caffeine prior to studying, writing papers, and taking exams. Caffeine is known to increase alertness, improve mood, and enhance cognitive performance. Increased alertness and concentration allows for easier retention and understanding of material, and can result in increased academic success. This information leads a person to wonder, is academic performance related to amount of caffeine consumption?…
Caffeine is one of the commonly consumed or most ingested stimulant or psychoactive substance in the world, known for it’s effect on vigilance and alertness level (A. Smith, 2002) or at least perceived to jolt our tired brains, when consumed in normal or moderate quantity. Caffeine is available to us from various sources like coffee, tea, cocoa, soft drinks and other such products. Caffeine is basically 1,3,7-trimethylxanthine (T. Brunye, 2010) and like any other stimulant tends to wear off easily. The body also tends to adapt to regular dosage of caffeine and so a higher dosage might be required to achieve the required effect. It takes about…