Sachin's Heart Rate

Aim: The aim of this experiment is to understand the affect of the drug Caffeine on the rate of a Daphnia’s heartbeat. This is to understand the affect of caffeine on a human’s heart rate and the use of daphnia keeps the experiment fair and safe.

Three Daphnia magna were placed in a petri dish with a small amount of spring water. Each Daphnia magna was measured separately. The Daphnia magna was placed on a slide and their control heart rate was measured for 15 seconds under the microscope and multiplied by four. Then, it was placed in the epinephrine solution for two minutes.The Daphnia magna was placed back onto the slide with the spring water and the heart rate was measured again for 15 seconds and later multiplied by four to observe the effect of epinephrine on the heart rate. They were then placed into a different petri dish of spring water after their experimental heart rate was recorded. All the heart rate values were placed into a Microsoft Excel document. The controlled variables included the temperature of the water, the time subjected to the epinephrine solution, and the time used for measuring the control heart rate and the epinephrine heart

The purpose of this lab was to determine the normal heart rate of a Daphnia Magna and decipher the different effects that various substances had on it. A Daphnia Magna is a species of water fleas and can be located in the Northern United Sates against the coastline of the Atlantic in rocky pools. The water flea’s habitat consists of rivers and streams, temporary pools, lakes and ponds, and brackish water. The Daphnia Magna range from two to five millimeters in length and are shaped like a kidney bean (Elenbaas, Molly). Relating to this lab experiment we learned in class that the normal heart rate is measured anywhere between 60 and 100 beats per minute (BPM). If your resting BPM is measured at a level above the number 100 it is known as Tachycardia. This term indicates that your heart level has exceeded the normal range. Also if your heart rate is indicated below 60 then it is called Bradycardia, which means the heart is beating slower than normal. When your heart rate is affected by a substance in the body it is called a Chronotropic agent. When the heart rate decreases because of a substance or chemical it is called a negative Chronotropic and when it is affected oppositely by increasing it is known as a positive Chronotropic agent. In this experiment we added many different substances to the slide on which the water flea was placed to calculate the increase or decrease in its heart rate due to the ingredients in the substances. The first substance used was

After completing the experiment we found that when we gave the Daphnia caffeine the heartbeat rate did show an increase. However, we also found that alcohol also increased the number of times the heart beat. Even though we performed all of the experiments very carefully, we cannot be certain that the effect we saw was due to the drugs. Perhaps the change in heartbeat rate is caused by

This experiment was carried out as noted about in Procedure 1. The resting heart rate was established and used as a baseline value from which to compare all future deviations. While data could

The authors then share their analysis on the changes of heart rate and GSR at the many different points throughout their study.

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 experimental approach would be to check blood pressure levels after eating fatty foods and after eating healthy foods and exercising.

The purpose of this lab is to test what effect of Nicotine, Acetylcholine, Epinephrine, Caffeine, and Ethanol on an organism’s heart rate.

The two priority problems for Mr. George are Hypertension and Diabetes (hyperglycemia). It has been demonstrated that arterial hypertension is major important determinant of heart diseases. The pathogenesis of hypertension is linked with multiple factors that include dietary, genetic, and patterns of lifestyle. The biological factors that determine hypertension include: atherosclerosis, resistance to insulin; hyper-responsiveness towards adrenalin based stimuli and dysfunction of endothelial cells. It was studied that the evidence suggests that decrease in the ratio of prevalence of high blood pressure gives rise to reduced ratio of cardiovascular related mortalities. It can be achieved through intervention with suitable medical therapy (Villalpando et al., 2010).

Table 1 (Figure 3) shows that the control is the lowest in heart rate, from there the heartbeat goes up when the daphnia are exposed to sugar. The difference between the control and the rest of the tests is very large. Although the data is very spread, the averages clearly show a significant difference between the results. The control group clearly showed that the heart rate of a daphnia magna is lower than the other two tests. The solution using the juice had more effect on the heart rate of a daphnia magna than a sugar solution and the control. The two sets of data that were taken with the daphnia exposed to the solutions were very close and shows that both have similar effects on the heart rate, they both increase the BPM of the daphnia

This is also reinforces the reason for using a control as using the control as a comparative baseline will take into account the effects of human handling. On the other hand, the control group had an average heart rate difference of 69.80 beats per minute as shown in Table B. This increase in average heart rate difference in the experimental group was expected as nicotine is a stimulant.

The purpose of the experiment is to see how different variables affect pulse rate and blood pressure.

Now that the experiment has been tested, the results are in there comes the analysis part of the process. After I had determined my calculation I saw where my beats per minute were over a hundred; this consider me to be Tachycardia. Tachycardia refers to an abnormally fast resting heart rate. When examining what Tachycardia was and how it can be affected made me see that different scenarios will affect the beats per minute. Anxiety, caffeine, stress can all cause someone to have such a rapid heartbeat. I remember from when taking the echocardiogram that I was stressed

The two major types of hypertension are primary and secondary. Primary hypertension accounts for more than 90% of all cases and has no known cause, although it is hypothesized that genetic factors, hormonal changes, and the altercations in sympathetic tone all may play a role in its development. Secondary hypertension develops as a consequence of an underlying disease or condition. The prevention and treatment of hypertension is a major public health issue. When blood pressure is controlled, cardiovascular, renal disease, and stroke may be prevented. The JCN, reported more than 122 million individuals in American are overweight or obese, consume large amounts of dietary sodium and alcohol, and do not eat adequate amounts of fruits and vegetables; less than 20% exercise regularly. Both modifiable and non-modifiable factors play a role in the development of hypertension