...Introduction The Daphnia magna, more commonly known as the water flea, is a tiny freshwater crustacean. Its clear exoskeleton and jointed appendages point to its classification as an arthropod. This is further evidenced by the location of its heart—the dorsal region. The Daphnia magna’s importance in the aquatic food chain can be attributed to its essential place in the diet of young and adult fish (Elbert, 2005). The Daphnia magna belongs to Class Branchiopoda, which are free-floating crustaceans that. It is also, more specifically, a member of Genus Daphnia (Ebert, 2005). Branchiopods always have flattened, partially leaf-like, legs. As a branchiopod, the Daphnia magna belongs to the Order Cladocera, which is protected by a calcified...
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...Effect of Substances on the Heart Rate of a Daphnia Magna Lab Report Katherine Schmucker WCCC/Semester 2 A&P 2/Bio-072 Dr. Matthew Sisak February 6, 2015 Introduction: The substances that were applied to the Daphnia were aspirin, nasal spray, adrenalin, acetylcholine, and alka seltzer (College, p. 42). Aspirin’s active additive is acetyl salicylic acid (Henderson, n.d.). The nasal spray’s active additive is “therapeutic (Administration, 2002).” Adrenalin’s active additive is “acid tartrate (Agency, n.d.).” Acetylcholine contains “5-methyl tetrahydrofolate, huperzine A, and alpha-tocotrienol (Research, 2015).” Alka seltzer’s active additive include aspirin, sodium bicarbonate, and citric acid (Alka-Seltzer Effervescent Tablets Original,...
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...Heart Rate of a Daphnia Magna WCCC Tina Reott Anatomy Physiology II /SPRING SEMESTER 2015 Dr Matt Sisak Introduction In order for the body to operate properly, it is necessary for homeostasis, or a relatively stable environment, to be maintained. The cardiac center is the medulla oblongata regulates the heart rate to maintain a stable environment. It is composed of two neural pools. One is the cardioacceleratory center and the other is the cardioinhibitory center. Each regulates the heartbeat through the sympathetic cardiac nerves and the parasympathetic fibers of the vagus nerves respectfully. Many factors affect the heart rate including sensory and emotional stimuli as well as receptor input from proprioceptors (in...
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...This experiment is to show how the heart rate can be affected by the substances caffeine and ethanol,Daphnia (Daphnia magna) are prone to alcohol and caffeine intoxication and react quickly to both solutions, therefor the effect of both the depressant and stimulant on the heart rate can be seen through the translucent exoskeleton . (John K. Colbourne) Caffein (trimethylzanthine) is a psychoactive drug, it is found in large quantities in a array of different foods and drinks.It is a cardiac stimulant, this occurs by it being a anti catalyst to the enzyme cyclic phosphodiesterace (Neal J. 1999) which keeps the heart at a steady pace with the help of C.A.M.P (cyclic adenosine monoposphate) this is produced by the hormone epinephrine. Without cyclic phosphodiesterace the heart beat increases, this is because the C.A.M.P diffuses through cells and activates...
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