Daphnia Experiment

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Daphnia

Daphnia are planktonic crustacean, often known as branchiopoda, and they’re characterised by their small half transparent body with leaf-like legs used to produce water current for the filtering purpose. Their average body size is approximately 1-5 mm long. The most common known features of daphnia are the antennae and its compound eyes. They mainly ingest unicellular algae and bacteria as they are a typical filter feeder.
These crustacean belong to the cladocera, which is an Order of the Entomostraca. This is a historical subclass of crustaceans and they have a few common features such as bivalve shell covering the body, excluding the head, two couple of antennae used for swimming and up to six pairs of legs.
There are a numerous …show more content…
Caffeine is known as an antidepressant and it’s broadly used as a psychoactive drug in various drinks such as tea, coke and coffee. Once caffeine is consumed, it enters the blood stream from the stomach and small intestine which begins to stimulate the nervous system. It stimulates receptors in the cells within the heart which increases the rate. This stimulation affects the speed of blood flow causing the heart rate to increase as well as the body temperature and blood sugar levels. Caffeine permeates through organs more rapidly than majority of other drugs. However, alcohol surpasses caffeine in …show more content…
This causes prolonged effects and amplified responses throughout the body, particularly in the heart as it prompts norepinephrine and a similar neurotransmitter, epinephrine (also known as adrenaline). These neurotransmitter causes the muscles of the heart to increase in rate and force of contractions. Although the two neurotransmitter are known to be related, they are released in different ways. Norepinephrine is released through sympathetic nerves found close to the tissues of the heart. On the other neurotransmitter, epinephrine is released through the adrenal glands. These neurotransmitter are mostly released during a stressful situation, increasing heart rate and force of contraction hence an increase in blood pressure and transfer of oxygen to respiring
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Daphnia Experiment

Studying How Different Environments Affect the Heart Rate of Daphnia Emily Wright (0522016): Year 11 Biology Tania Balind  Table of Contents Factors Affecting Heart Rate 1 Abstract 2 Introduction 2 Method 3 Risk Assessment and Ethical Considerations 4 Results 4 Discussion 5 Appendix 6 Abstract This experiment aimed to find the effects of different substances on heart rate in Daphnia Magna. The two substances used were caffeine (a stimulant) and…

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Daphnia Experiment

The results would suggest that each of the solutions besides the control that the Daphnia were bathed in had an effect on how the neurons on the heart of the Daphnia produced rhythmic outputs to the rest of its body. This indicates that external factors have an effect on the heart rate of Daphnia. For example, in the control or room temperature test, the heart rate for that Daphnia was a normal rate, but at 5℃ the heart rate decreased a lot. The results for the control and the 5℃ water were as expected…

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Daphnia Magna Experiment

In the present study, the influence of temperature on the heartbeat rate of Daphnia magna was studied using variations of temperature. To determine whether the Daphnia species heartbeat rate is influenced by temperature, the effects of three different temperatures (±5oC, ±16oC, ±34oC) was investigated. Daphnia magna is a crustacean, that lives in aquatic environments. Predictions were based on the knowledge that physiological processes increase at higher temperatures, therefore, it was hypothesized…

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Daphnia Magna Experiment

The Daphnia Manga, also known as the Water Flea, is commonly found in the Northern Hemisphere.The Daphnia Magna inhabits fresh and brackish bodies of water. The Daphnia Magna, the recurrent size for Males is 2mm while Females is 5mm but their size can differ due to temperature. Along with the change in sizes, their heartbeats can change in different environments. For our experiment we are seeing the reaction of different amounts of caffeine on the Daphnia Magna s heartbeat. This experiment is important…

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Daphnia Magna Experiment

The objective of this experiment was to observe the heart rate of Daphnia magna, water fleas, under a light microscope as they were introduced to three different substances. The first substance was spring water, then green tea, and lastly black tea. Each of the substances had a different effect on the Daphnia magna, increasing its overall heart rate. This experiment was preformed by using a pipette to place a single Daphnia Magna into the well of a concave slide and using a light microscope to observe…

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Plant Defenses (Daphnia) Experiment

Topic: Plant Defenses (Daphnia) Experiment Author’s Name Professors Name Institutional Affiliation Date Abstract The experiment was carried out to determine the effect of plant defenses on Daphnia magna which is a small herbivore. The plant defense that was used in this experiment was black and green tea. The Daphnia Magna was placed in on a microscope and the HR (heart rate) per minute was recorded. After the introduction of black and green tea to the small herbivore, the heart rate…

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Daphnia Experiment: Crayfish Mortality

Discussion: Our principle prediction: Crayfish mortality will increase with increasing concentrations of oil (we predicted this because of what is seen with oil spills) Comparison to the Daphnia experiment What was different about our results and what was similar Comparing the water oil levels to other oil spills and the observed reactions (compared to ours and the articles that we found) Ex: Wyoming Wetlands Ex: Marshes in Louisiana Meaning of the study: most oil spills will lead to mortality…

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Daphnia Magna Experiment

Change on the Heart Rate of Daphnia magna Reasonable The water bug Daphnia magna expect a central part in the maritime developed lifestyle and serves as nourishment for other freshwater living creatures, for instance, point. Its living space shows extraordinary assortments in temperature which impacts its metabolic and physiological methods, for instance, heart and ventilation rates. We investigated the effects of temperature change on the metabolic/heart rate of Daphnia magna besides, chose the…

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Daphnia Magna Lab Report

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daphnia report1 Essay

Hypothesis/ Null hypothesis : As the caffeine concentration rises, so does the mean heart rate of daphnia. Caffeine does not affect the heart rate of daphnia. CAFFEINE: Caffeine mimics some of the effects of adrenaline and noradrenaline in the heart. It also increases the amount of cAMP in the senatorial node. Caffeine has additional effects on the heart. Like adrenaline and noradrenaline, it can affect the main pumping chambers (ventricles), leading to an increase in the rate of contraction and…

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