The data shows that when the temperature of the water surrounding the deep well slide containing the Daphnia magna increased, the heart rate of the Daphnia magna increased, and when the temperature of the water decreased, the heat rate of the Daphnia magna decreased as well. For example, when the water was at room temperature, 21° C, the average heart rate was 393.33 BPM. When the water temperature was increased to 30°C, the average heart rate increased to 510.66 BPM. When the water temperature was decreased to 10° C, the average heart rate in beats per minute decreased to 332 BPM, less than both the 21° C and 30° C results. The warmer the water temperature was, the higher the heart rate of the Daphnia magna.
Plant compounds play a very important role in the defense of plants and in this experiment the plant defense compounds of caffeine and Kava-kava were tested on Daphnia magna to test if there was a change in heartbeat of the organism. The purpose of
Materials * Microscope * Eye dropper * Pipet * Cotton balls * Depression slide * Beakers * Daphnia * Water * Five additives: Nicotine, Acetylcholine, Epinephrine, Caffeine, Ethanol Procedure 1. Put on safety goggles. 2. Catch a living Daphnia. 3. Transfer to a depression slide and add water. 4. Add cotton ball fibers to restrict movement of the Daphnia. 5. Establish the resting heart rate of the Daphnia. Count the amount of beats for ten seconds then multiply that number by six to convert it to beats/min.
The aim of this experiment is to observe whether caffeine has any significant effect on heart rate. To test this, daphnia will be placed in water and then caffeine solution, so the
Then using a disposable pipette we placed two drops of room temperature water (21 degrees) on top of the Daphnia. Then placing it careful under the microscope with a for 15 seconds using a tally counter and clicked away how many heart beats we observed and did this three times for three trials, in between the times would give the daphnia a two minute recovery period. We then would process the trials information and calculate an average. After the information calculated we then multiplied our results by four to see the average heart beats per minute with room temperature water. We gave the daphnia five minute to recover then went on to proceed with two drops of hot water (40 degrees celsius) placed on top of the Daphnia using the pipette. Again three trials for 15 second using the tally clicker following after a two minute break. The same followed for the cold water (0 degree celsius) placing two drops on top of the Daphnia administered by pipette. In between the transitional water temperature trials we then cleaned up the excess water before placing new drops of water by gently soaking up the water with kimwipes. After five minutes we tallied the heartbeats of the Daphnia before administering the epinephrine. Then again gently gave two doses of epinephrine using a new pipette. Then after we observed and tallying the heart beats before administering the epinephrine, three times again recording our results then averaging it. Then we placed two drops of the epinephrine on top of the daphnia, tallying the heartbeats and recording and calculating our trial results. Then after two minutes we observed and tallied the effects after the epinephrine had been used. Each trial again consisted of observation under the microscope, tallying and observing the behavior internally and externally of the
In the first experiment, the heart rate of Daphnia at different concentrations of Nyquil® was analyzed. Nyquil® was added in 1:1, 2:1, 3:1, and 1:0 concentrations which caused a +16, +36, +68, and +108 BPM increase, compared to the control. On the other hand, all Daphnia died at high concentrations of ethanol, and the only time Daphnia survived was when the concentration of ethanol was diluted almost 80%. And with that dilution, the Daphnia’s HR was 28BMP, 152 less than normal heart rate of
Methods: To begin the experiment, we took a single Daphnia magna from the unused tank to run control tests with distilled water on the untampered heart rate of the species. The species was placed on a concave slide with a new drop of water on it. It was given 2 minutes of recovery time to adjust to its new environment; then, the heart rate was studied by intervals of 15 seconds to find beats per minute by multiplying the number of beats in 15 seconds by 4. The Daphnia magna was studied under a light microscope with 40x total magnification. After each round of data collection, the water was absorbed with a Kimwipe so a new water drop could be placed on the species. The same Daphnia magna was used for six rounds of control experiments. After
The objective of this study is to know what is the effect of oil released in lake to the organisms that live there. There are eight experiments done, by the use of the organism Daphna magna. In sample container there is oxygenated, dechlorinated water and 0.2% motor oil. The daphna magna was also added. Every 24 and 48 hours will record how many organisms are alive. For the results, 50% of the organisms die.
D. Causes and Effects The effects associated with alcohol are produced by the ethanol in the alcohol. The severity of these effects is reflected by the concentration of alcohol in an individual’s blood, which is dictated by the amount of alcohol ingested, the volume of blood, the individual’s metabolism, and amount of time since ingestion. In large doses, alcohol acts as a depressant of the central nervous-system. A blood alcohol level of 0.1% affects some of the motor areas of the brain associated with speech, balance and manual dexterity. A blood alcohol level of 0.2% depresses all motor functions and the area concerned with emotions is depressed. At a blood alcohol level of 0.45% the entire section of the brain that handles perception is depressed and the individual becomes comatose. At a blood alcohol level of 0.7% the parts of the brain that control the heartbeat and breathing are depressed and the individual
Comparison of heart rate within the groups S.NO Group A Group B Group C Baseline 84.53 84.3 85.7 At start 85.1 87.03 86.57 1 min 72.87 72.9 73.7 3 min 83.2 83.3 83.3 5 min 105 88 86.9 15 min 98.4 83.5 91.5 30 min 81.6 81.5 96.1 45 min 80.5 82.1 96 60 min 81 82.2 96.4 75 min 80.4 81.8 97.1 90 min 79.6 81.5 98 105 min 79.1 80.9 96.9 120 min 79 80.7 97.1 The baseline heart rate of GROUP A is 84.53 , GROUP B is 84.30 and GROUP C is 85.73 showing that there was no significant difference in the baseline heart rate between the groups. After induction with propofol there was a decrease in heart rate in all the groups which was found to be significant. In GROUP A patients there was increase in the heart rate during laryngoscopy with a mean heart
Alcohol is a diuretic. Diuretics are medicines which cause the removal of water from body. They are able to achieve this by increasing the amount or volume of urine your kidneys produce. The amount of water which is absorbed from the loop of Hénle is greatly reduced as the concentration of Na+ remains in the filtrate, this prevents the water being drawn into the renal medulla. Normally in the case of diuretic drugs, this would decrease the total blood volume in the body, giving your heart less work and reduce blood pressure, making diuretics a choice drug for heart failure and high blood pressure. Alcohol reduces the production rate of vasopressin, which also acts on the kidneys, decreasing the amount of water reabsorbed into the body. All
Jungsoo Kang LIFE103-L16 The Effect of Rainforest Soundscapes on the Human Cardiopulmonary System Introduction Depending on the environmental stresses placed on a human being, the heart rate and blood pressure can increase or decrease as a response to the stress. After the stressor is removed, the human body naturally returns a normal or
In Daedalus, the author promotes the tone of mournfulness. As the story begins,the tone is shown by Daedalus personality. The author says:” The next instant, horrified at what he had done, he rushed down to the boy.” (1)As the story continues, the mourning tone is expressed through analogy. The author states:” The king was so afraid Daedalus would reveal the secret of Labyrinth that he would not let him leave the island.”(2) Towards the end, mournfulness is clearly shown by diction.The author describes:” There, on the lonely island which bears the boy’s name, Daedalus buried his only son.”(3) Overall, the author’s tone of mournfulness reinforces the idea that you can make poor choices and you can still be a good person.
Alcohol is a depressant, in a meaning that shows down vital function. Equals in problems in slurred speech, unsteady movement, disturbed perceptions and an inability to react quickly. This best understood as a drug that reduce a person's ability to think about decisions and can’t be surrounded around themselves. Although, the amount of alcohol consumed the types of effect. Most people turns their life around due to getting a habit of during alcohol. After a while, people feels bored, tries to stop doing alcohol but never work. Studley, their lose coordination and control from the alcohol depressant effect.
Daphnia are naturally found at very high densities, they play important roles on the community food web dynamics, as they feed on algae which is important to energy transfer between consumers. Also, Daphnia may directly affect the structure of their community by consuming algae, not only by providing food to consumers but also regulating algae, as different organisms survive better in more or less algae accumulation. Therefore, it is important to understand what effects their rate of feeding.