The Effect of Caffiene on Heart Rate

According to the results, the columns of caffeine in figure 1, of this experiment the hypothesis for caffeine is partially accepted. There is an increasing trend in the change of pulsation rates with increasing

The experiment conducted primarily focused on the heart of the Daphnia magna and how it is affected by caffeine and nicotine. The organism is transparent this key feature is ideal for a model organism. During the experiment a total number of four organisms were treated with caffeine and nicotine. Caffeine is a stimulant of the nervous system. (Caffeine. 2015) Caffeine is present in highly consumed products such as coffee, tea, chocolate, alcoholic and non-alcoholic beverages. (Caffeine Uses. 2014) The stimulant has a side effect of increasing heart rate in humans. (Howell, Lopez, Marshall, & Peters 2003)

Next we removed the excess solution from the Daphnia and flushed it with aquarium water. Using the same procedure we monitored the effects of 1 1/2% and 2.0% caffeine

In order to complete this exercise, two different procedures were conducted; one measured the basal heart rate, and the other measured the drug-induced heart rate. A sample 's basal heart rate can be defined as the “resting” heart rate. This is when no drugs or altering substances are applied. In comparison, the drug-induced heart rate of a sample can be defined as the heart rate after the drug was administered to the surrounding environment. The four drugs tested on the Daphnia specimens were Acetylcholine, Caffeine,

The effects of caffeine and alcohol on daphnia are expressive of whether these substances are harmful or beneficial to the organism. By understanding the results of this experiment, it may also be understood how these substances effect humans. In this study, one daphnia was exposed to increasing levels of alcohol, while the other was exposed to increasing levels of caffeine, each in order to test the hypothesis that when given amounts of caffeine and alcohol, the daphnia will be affected the same way a human would. The effect of each substance was measured by the daphnia’s heart rate one minute after the substance was added. Results reveal that alcohol slows the heart rate, while caffeine increases heart rate. Furthermore, caffeine shows a

No cover slip was used as it would have damaged the water flea and stopped its oxygen supply. Before placing the slide under the microscope, a tissue was used to remove the pond water around the Daphnia and with a pipette plain water was added to the cavity slide.

The purpose of this experiment was to see if caffeine had an effect on the heart rate of Daphnia (water fleas) by observing them under the microscope and recording their heart rate over a period of time in concentrations of caffeine. Caffeine, which is a stimulant drug rttused in coffee, tea, Red Bull and Pro-plus, causes increased amounts of stimulatory neurotransmitters to be released. As caffeine is a stimulant, a prediction was made that caffeine would increase the heart rate of the Daphnia.

Individual Daphnia magna are transferred to a microscopic slide using a pipette. The Daphnia was moving freely in a drop of H2O on the slide. For the control, the heart rate of D. magna is observed for 15 seconds

In this experiment we find how caffeine can affect the heart rate of a culture Daphnia. Heart rate of a living organism’s can vary depending on the individual, age, body size, heart conditions, medication use and even temperature. This report will examine if the caffeine is good or bad for the living organism’s health and body. And discuss about where the caffeine is produced and used in daily life of human beings and on the environment. Daphnia is a water flea used in this experiment because of its genomic infrastructure with wide range of phenotypic diversity. This quality of Daphnia makes them a versatile model for the experiment. Also their transparent body allows the experimenter to visually see how the heart beats and count them under the light microscope during the experiment as required. The heart rate of Daphnia is monitored under different concentration of caffeine solution and the results are shown in a table and a graph. Experiment carried out to locate the effects of caffeine on a heart rate of Daphnia may or may not be a predictor of change in human heart rate under caffeine. The effects of caffeine can also be tested on humans but those experiment involving humans contains high risk, as Daphnia can only live for a short period of time and in nature most of them get eaten within their first few days or weeks of life.

This paper explores and explains the findings of the heart rate experiment conducted by the students of Grand Canyon University for the Anatomy and Physiology 202 Laboratory course. Over a two week time span, students were asked to record their heart rate, before, during, and after activities as instructed by the professor. Specifically, this paper focuses on the female students, comparing the heart rates of individuals who reported that they drink coffee versus those females who reported that they do not drink coffee. The effects of caffeine contained in the coffee were examined and it was noted that those who drink coffee have lower heart rates before, during, and after times of examination. These findings suggested that the hypothesis proposed prior to research, Females Who Drink Coffee Have a Higher Heart Rate Prior to Exams, was an incorrect statement.

The Effect of Caffeine on Goldfish Metabolism Introduction Metabolism is the sum of all anabolic and catabolic reactions within a living organism. The energy required to perform these reactions is provided by oxygen in the form of ATP, therefore the oxygen consumption rate can be measured to determine the metabolic rate. Since oxygen is obtained through respiration, the efficiency of respiratory system affects the metabolism. Previous studies have shown that caffeine affects the human respiratory center and occasionally dilates bronchus. It can therefore simulate human respiration and increase the metabolic rate (Haggins et al, 1915).

Exercise 2 was separated into six parts, five of which can be seen in Table 2 and the sixth one in Table 3. Acetylcholine decreased the heart rate due to the fact that it works in the parasympathetic nervous system and increases potassium flow into the heart.

Sudden cardiac death (SCD) accounts for approximately one half of all cardiac deaths [Zipes and Wellens, 1998], and, although coronary artery disease (CAD) underlies most SCD events, SCD may be the first manifestation of CAD in many individuals, especially women [Albert et al., 2003]. Coffee and other caffeine-containing beverages such as tea, colas, and guarana, a soft drink made from the caffeine-rich seeds of a South American fruit pass certain kind of diseases. Many ills have been ascribed to caffeine, but few have been substantiate [Frost et al., 2005].The effect of caffeine on a disease often associate with caffeine namely, disruption of cardiac rhythm. Arrhythmias are often due to structural heart disease caused by atherosclerosis, hypertension,

The metabolism results of study A showed caffeine results (Fig. A) as expected. Pre-caf gave the earliest caffeine reading, followed by dur-caf. Urinary caffeine levels (Fig. B) were well below the International Olympic Committee regulation of 12µg/ml. Plasma analysis showed that blood glucose levels were higher in the pre-caf treatment, possibly due an increase in metabolic rate from the

One part of the human body that too much consumption of caffeine can affect negatively the your heart. Caffeine speeds up your brain cells, which speeds up your heart beat in the process. Too much caffeine will also raise your blood pressure. Caffeine using adults were polled on their stress levels given a 1 to 5 rating, with 5 being the most stressful. With each stress rating, each adult averaged a 1.7/0.4 mm Hg in blood pressure, and 1.8 beats per minute more in heart rate than adults in the lower stress rating (Lane, J.D., 2002). With further testing, they found that stress level and caffeine went hand in hand, with the highest caffeine users being the ones with 5 stress ratings. This study showed that consuming caffeinated beverages raises your blood pressure and heart rate by a considerable amount. In the same study as above, they used 500 mg of caffeine (close to 4 cups of coffee) to see how much it raised a person’s blood pressure throughout a single day. On average a person’s blood pressure was 4 mm Hg higher during than day than on a normal