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Daphnia heart rate experiment write up
Daphnia heart rate lab
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More handpicked essays just for you.
Daphnia heart rate experiment write up
Daphnia heart rate lab
Don’t take our word for it - see why 10 million students trust us with their essay needs.
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
The hypothesis for this experiment is that if daphnia are exposed to ethanol, aspirin,
Based on the results the hypothesis is correct that if tobacco extract is added to food vacuoles that less vacuoles will be visible and cellular process would slow down. The contamination of samples and the use of tetrahymena in which most of the cells in the samples were dead made it difficult to get a ratio of cells to vacuoles that accurately depicted the difference between cells with nicotine and cells without. Factors that affected the accuracy of the experiment was unfamiliarity with the equipment and difficulty of find the cells on the slides. One questions posed is at what concentration of nicotine would other cell functions begin to shut down. From this experiment, we can see that the assumption we made about human appetite suppression could be
Corotto, F., Ceballos, D., Lee, A., & Vinson, L. (2010). Making the Most of the Daphnia Heart Rate Lab: Optimizing the Use of Ethanol, Nicotine & Caffeine. The American Biology Teacher , 176-179. The purpose of this article was to test the effects of chemicals on Daphnia magna.
Poe’s stories “Cask of Amontillado” and “The Tell-Tale Heart” display the dark romantic theme of a man’s soul by the development of the setting, plot, and characterization. As both stories begin, the initial device used to advance the theme is setting, which remains grim and sinister throughout the duration of both stories. Accompanying these physical details is the plot, each of which includes the murder of an innocent man. Most notably, the characterization of each piece’s narrator allows the audience to fully understand their internal struggle and its final resolution. While “Cask of Amontillado” contains an overall intriguing and unexpected plot as well as setting, the narrator’s characterization proves this story to conclude in a less
There are so many different ways to relay a message to a reader using different types of figure of speeches, symbolism being one of the greatest forms of figure of speech. Symbols uses ideas or qualities to represent indirect suggestions to express emotions, natural objects, symbolic images or facts. In Edgar Allen Poe’s two short stories “The Tell-Tale Heart” and “The Cask of Amontillado” show great representations of death by using symbolism, while in “The Tell-Tale Heart” uses the setting, title and amontillado. In the short story “The Tell-Tale Heart” the author uses the man old man’s eye as a symbol.
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
Stimulants increased the worms’ pulsation rate during the experiment. b) After the comparison of data, I found that the mean pulsation rate for the worms suspended in alcohol was slightly lower than the pulsation rate of the same worm before contact with the drug. After contact with the alcohol the mean change of pulsation rate ranged from -2 to 2, with the average result being 0. These shows use that that alcohol did decrease some of the worms’ pulsation
“I've heard many things in the heaven and in the earth. I've heard many things in hell”(Poe). In the story The tell tale heart, a man ends up killing his old man over his “Vulture eye”. He loved the old man. But his “evil eye” vexed him and he decided to take his life.
“He saw that he was stone dead. His eye would be trouble no more.” (Poe, 1843) In the horror story, “A Tell-Tale Heart” by Edgar Allan Poe, it revolves around a first-person view of an unnamed narrator. He is dedicated to killing an old man, because of his “eye of a vulture.”
Edgar Allan Poe was one of the world’s greatest and most influential connoisseur of short story. He was born on 19th January 1809 in Boston, orphaned at an early age and adopted by a merchant called John Allan from Richmond, Virginia. The Tell-Tale Heart was one of Poe’s famous short stories and it was first published on the 1843. The Tell-Tale Heart is generally considered as a classic of the Gothic fiction genre. If The Tell-Tale Heart was a song, it would be such a painful song to be listened to.
The growth of tobacco is an extremely strenuous process. Tobacco is extremely taxing on the land on which it is planted and saps the soil of its fertility and ability to be used for other useful agricultural products. Negative environmental effects are agreed upon in the Bellagio statement on tobacco and sustainable development, “Environmental degradation also results from the tobacco plant leaching nutrients from the soil, as well as pollution from pesticides and fertilizers. Indeed, large and frequent application of pesticides…” Participants in the Bellagio statement include FAO, National Cancer Institute/Health ministry, United States Centers for Disease Control and Prevention, and more. Furthermore, forestation is immense due to the tobacco industry.
Since tobacco has been introduced to other continents from the Americas in the 16th century, tobacco has become widespread in the world. With the progress of relevant scientific research and the increasing publication of scientific papers on the harm of tobacco, the harm caused by tobacco to public health has gradually become known. Cigarette smoking is the most popular method of consuming tobacco (“Wikipedia”, n.d.). According to the World Health Organization (2017), there are more than one billion smokers in the world. More than seven million people were killed by tobacco.
“Tests for nicotine, conducted at various stages in the plants life” they found that the plants had “tremendously elevated nicotine levels,” “In principle, also other compounds could be taken up in the same manner,” he added. “However, as most components are not volatile, an uptake via the soil is much more likely. We are just looking for the uptake of other
One scientific study researched effect of different nicotine concentration on Oryza sativa and Zea mays. In this research, the quantity of nicotine dose has an opposing effect: increase in nicotine dose inhibited the percentage germination and growth of radicle and plumule for O. sativa, whereas increase in nicotine dose promoted the growth of radicle and plumule, and increased percentage germination for Z. mays for some extent. This suggests that different plants actually react differently to nicotine. Contradicting studies about the effect of nicotine on plant growth have been reported so