just a year? Cancer is the biggest risk when you smoke‚ it can cause mouth‚ kidney‚ stomach‚ throat‚ and heart disease. Cigarettes are the worst‚ because one of the types of chemical called nicotine. Nicotine is the most addictive chemical just after you try it you want it every second of every day. Nicotine does not cause as many diseases as secondhand smoking or cigarettes. Secondhand smoking can cause cancer even if you don’t smoke‚ when you are a non-smoker and you are exposed it is called involuntary
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The purpose of this study is to understand the feeding rate of Daphnia magna. D. magna is a species of Daphnia that belongs to the suborder Cladocera (Ebert‚ 2005). They live in freshwater and feed on small‚ suspended particles in the water. They are filter feeders. Phyllopods‚ which are leaf-like appendages‚ provide a filtering apparatus for the collection of food. These structures beat to produce a constant current of water‚ allowing particles to be filtered by fine setae on the thoracic legs.
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Extraction of Caffeine from Tea Leaves Jaybee Balilea‚ Sharmaine Baysic‚ and Maria Anjelette Patricia Belen 3BIO7‚ Department of Biology‚ University of Santo Tomas‚ Manila‚ Philippines Abstract Extraction is a technique for isolating and purifying organic substances. In this technique‚ a solution is combined thoroughly with a second solvent that is immiscible with the first solvent. The solute is extracted from one solvent into the other because it is more soluble in the second solvent
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Isolation of Caffeine in Tea Introduction Today’s world is addicted to coffee and tea for an easy wake up. Both contain caffeine‚ a drug known for its stimulant properties. Tea‚ by weight‚ contains approximately 2-4% caffeine‚ and the average cup of tea has anywhere from 40 to 120 mg of caffeine (Landgrebe‚ 327; Mayo Clinic Staff). According to the American Heart Association‚ caffeine not only stimulates the brain and nervous system‚ but it releases fatty acids from adipose tissue‚ and affects
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Daphnia are cold-blooded poikilotherms that rely on heat from the surrounding water to maintain their body temperature. An increase in the water temperature should equate to an increase in metabolic activity due to enzymes working at a temperature closer to their optimum level. However‚ once the optimum temperature has been exceeded‚ the enzymes will begin to denature. Hydrogen bonds‚ which keep the protein conformation‚ begin to break‚ causing a change in shape of the active site; substrates
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4.3. Interactions between nicotine and baclofen Activation of nAChRs within different areas of brain enhances release of several neurotransmitters including: glutamate‚dopamine‚norepinephrine‚ serotonin‚ ‚gamma amino butyric acid(Wonnacott‚ 1997)‚ (Benowitz‚ 2008) The regulation of releasing these neurotransmitters which is induced by nicotine`s effects depending on various postsynaptic receptors‚ is the usual mechanism by which nicotine modulates behavior (Benowitz‚ 2008).As we mentioned above
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Summary Caffeine is a stimulant for the central nervous system which will relax the muscle and increase the gastric acid and heart rate (Kelly‚ 2017). The analyzing of caffeine and caffeine metabolites in saliva is to quantitatively measure the ratio of concentrations of caffeine and metabolites. There are three different metabolites of caffeine and the majority of caffeine metabolite is paraxanthine. The ratio of concentration represents the activity of the first metabolism enzyme of caffeine‚ CYP1A2
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the daphnia to a chemical stimulant. Also examined was how human resting heart rates differed from the daphnia’s. Stimulants are any substances that raise the levels of activity in the body. Stimulants could be a number of things such as physical or chemical. Physical stimulus usually deal with something that affects the five senses such as sight‚ hearing these could be attributed to loud noises or too much light going into your eye. Chemical stimuli differ because chemicals such as caffeine and
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ALCOHOL Alcohol Abuse among Teenagers Composition II- Professor Dennis Lawrence Alcohol Abuse among Teenagers Alcohol abuse among teenagers has many adverse effects on their lives. For whatever reason‚ this abuse has gotten out of hand. The teenagers don’t realize the consequences of drinking alcohol are as severe as they are. Some of the effects of this abuse are health problems‚ loss of interest in school and home activities‚ and probable drug use in the future. These effects
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Caffeine and Sleep • Sleep Topics Caffeine has been called the most popular drug in the world. It is found naturally in over 60 plants including the coffee bean‚ tea leaf‚ kola nut and cacao pod. All over the world people consume caffeine on a daily basis in coffee‚ tea‚ cocoa‚ chocolate‚ some soft drinks‚ and some drugs. Because caffeine is a stimulant‚ most people use it after waking up in the morning or to remain alert during the day. While it is important to note that caffeine cannot
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