Internal temperatures can modify the contraction of the heart by increasing or decreasing heart rate.5 The goal of the experiment was to subject the crayfish to different conditions to monitor the change in contractility of the
Daphnia Magna are small crustaceans that are excellent for observing the effect of depressants on their nervous system. The purpose of this specific experiment is to observe the effect of ethanol, aspirin, and caffeine on daphnia’s heart rate. Not only do these chemicals affect heart rate, but they also affect the frequency of reproduction, number of eggs produced, and body structure. Pesticides similar to these chemicals can be released into the environment and daphnia re useful in monitoring toxicity levels. The agents being tested in this experiment can be administered to determine the effects of hormones, stimulants, antidepressants, and neurotransmitters.
Caffeine, Nicotine, ethanol, and a control solution were tested. The heart rate of Daphnia was measured after exposure to each of the chemicals. After testing, it was found that ethanol depressed the heart rate while exposed, but the heart rate stabilized after exposure. With exposure to nicotine, the heart rate increased by 20%. If more nicotine was added, the effects were varied and sometimes irreversible.
My group recorded higher heart rate compare to the class average when we used caffeine on the Daphnia as seen in Figure 2. Several errors could have accounted for this data. This including perhaps the Daphnia’s heart rate may have changed because of fear while being moved from the bowl to the microscope slide. Another possible error could have also been the amount of time that it took to change the solutions, which could have accounted for slight variations in heart rate. Temperature is yet a further error to account for as the microscope slide temperature was constantly changing to view the specimen, and change the dosage of caffeine or alcohol.
Nonetheless, besides fish, many other kinds of poikilothermic animals, such as snakes and frogs, use lungs instead of gills to breathe, and further researches may be conducted to explore if caffeine has an effect on their metabolism. For example, forty northern leopard frogs with similar body size will be captured and divided into twenty trials, and each two frogs will be tested in the same control and experimental conditions as the goldfish metabolism experiment did. The collected slopes of oxygen concentration will then be converted into oxygen consumption rate and analyzed by the paired t-test. If the difference in the oxygen consumption rate between the control and experimental groups is statistically significant, this experiment will show that caffeine affects the metabolism of frogs, one kind of poikilotherms that use lungs to
Research Question: To investigate and compare how different temperature (5℃, 15℃, 25℃, 35℃, 45℃) can affect the concentration of carbon dioxide in soda water through titration with sodium hydroxide solution. Introduction: Carbon dioxide plays an important role in soft drinks. Soda water is manufactured by pumping carbon dioxide into water under high pressure. Carbon dioxide dissolves in water to form carbonic acid, which is the fizz we find in soft drinks. CO2 + H2O ⇌
Diet Coke is just as harmful as regular Coke, maybe even more. The combination of caffeine and aspartame makes a substance that is similar to cocaine. “The potentially deadly combination of caffeine and aspartame creates a short addictive high similar in the way cocaine works. ”(The Renegade Pharmacist) This means that the combination of caffeine and aspartame produces a substance that functions similar to cocaine.
Drug addiction is a constant war. It is a battle being fought between oneself, possibly family, friends but always, the drug. Yet for anyone that is struggling, there is hope. Despite our differences, there will always be a path to recovery. In “Water by the Spoonful”, Quiara Alegría Hudes incorporates several strategies and tactics through various character’s agencies and symbolism to ultimately create a piece that centers recuperation.
“Drinking Coffee Elsewhere” by ZZ Packer follows the story of Dina, a young black girl from Baltimore, as she copes with life studying at Yale (117-119). Throughout the story, Dina seems to be a fiercely and independent character that likes to be on her own and away from society. She always speaks her mind, regardless of the consequences, but her independence destroys her because of her lack of introspection. This helps her to give up things that will help her get out of her individualism. Due to this, she pushes away the only friend she has because of her inability to understand herself, and her toxic personality.
“Effect of Caffeine on Leg-Muscle Pain During Intense Cycling Exercise: Possible Role of Anxiety Sensitivity” Article Summary Rachael C. Gliottoni and Robert W. Motl wrote the article entitled “Effect of Caffeine on Leg-Muscle Pain during Intense Cycling Exercise: Possible Role of Anxiety Sensitivity” focuses on the possible effect of caffeine on the opinions of leg pain. Published by the International Journal of Sport Nutrition and Exercise Metabolism, the researchers had sixteen college-age women drink moderate dose of caffeine or equivalent to 5 mg/kg body weight as placebo. After one hour, Gliottoni and Motl also asked the participants of the research to complete cycling on an ergometer for 30 minutes. While doing the experiment, the
It beats for about 60 times per minute as compared to human heart which beats for about 80 times per minute. A manatees heart is seen to beat slow as 30 heartbeats per minute on longer dives. Whereas in dugongs it has double ventricular apex of heart. The unusual feature of the sirenian heart is that the heart has double subvalvular conus and dorsal left atrium.
Hypotheses: Do you expect heat to be a chronotropic factor? Yes Do you expect heat to be an inotropic factor? Yes Procedure and Results: Control Heart Rate (After rinsing) beats/min Experimental procedure Heart Rate after treatment beats/min Change in Heart Rate beats/min Strength of Contraction after treatment compared to normal (stronger or weaker) Baseline rate: 72 Continuously drop warm Frog Ringer’s onto the heart 48 -24 Weaker Rate after rinsing: 72 Continuously drop cold Frog Ringer’s onto the heart 60 -12 Weaker
Tom Standage’s book “A History of the World in 6 Glasses”, showed how six varied drinks can have drastic effects on human civilization. Beer, wine, spirits, coffee, tea, and Coca-Cola all have helped mold the world into what it is today, and though the marks of alcoholic and caffeinated drinks are different, there are similarities between them as well. With their effects on the body being polar opposites, alcohol and caffeine impacted economies differently, and even influenced the U.S. in their own distinctive ways. One thing they both share however is their impact on ancient medicine, giving way to decreased disease and increased population. Alcohol was first consumed as beer in ancient Sumeria when growing wheat and barley became popular.
Caffeine is a chemical found naturally in few plants all over the world. From these plants it is processed into its pure form and then put into other things such as soda, energy drinks, tea, and pills. Energy drinks and soda are some of the most widely marketed products in the world, even though they contain the highest concentration of caffeine outside of pure caffeine supplements. It is a stimulant that affects everyone in strange but semi predictable ways. Research has been done on this topic since the 1920’s and many different conclusions have been reached.
Coffee is one of the most popular drinks in the world. In fact, it is estimated that every year, more than 400 billion cups of coffee are consumed all across the world. For many, it is the choice of drink early in the morning before work while for others it is the drink of choice when they want to burn the midnight oil. Well, whatever the case, there are many benefits in drinking coffee and some are quite shocking and unexpected too! 1.
