Purpose: Cells produce toxic wastes‚ in this experiment hydrogen peroxide‚ and without some sort of molecule to break it down the cell will die‚ along with the organism itself. However with the aid of an enzyme‚ catalase‚ hydrogen peroxide is able to be broken down into an intermediate and thereafter harmless substances water and oxygen. The goal of this lab is to measure the reaction rate of this process in different substances such as a liver‚ a vegetable‚ and breast tissue. By using variables
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The beginning and end of a cheeseburger Scott Johnson The process all begins when one begins to bite into a cheeseburger. The lips and cheeks are very important in this process of mastication‚ or chewing. They help manipulate the hamburger and its add-ons within the mouth and hold it in place while the teeth crush or tear it. The incisors and canines primarily cut and tear the hamburger‚ while the premolars and molars primarily crush and grind it. Mastication begins the process of mechanical
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to pancreatitis commonly known as acute pancreatitis. This usually happens because of gallstones which are crystallized cholesterol deposits or calcium crystals ionized with bilirubin. This sudden occurrence of acute pancreatitis is also called Amylase and Lipase. When the label of Acute is used before the symptom it does express that it is a brief course of symptoms that will last for less than 6 months or in some instances cause death. Another common type of pancreatitis is chronic pancreatitis
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mastication‚ a form of mechanical digestion where the teeth allow the chewing of food to aid in the digestive process and the wetting contact of saliva ("Wikipedia.com"‚ 2013). Saliva‚ a liquid secreted by the salivary glands‚ contains salivary amylase‚ an enzyme which starts the digestion of starch in the food. After undergoing mastication and starch digestion‚ the food will be in the form of a small‚ round slurry mass called a bolus. It will then travel down the esophagus‚ the portion of gastrointestinal
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the cephalic phase of digestion‚ which is the stimulation and release of digestive juices in preparation of the food. Once inside the mouth‚ my teeth and salivary enzymes help to break down the food components into smaller molecules. This chemical amylase in our mouth helps to start breaking down the food chemically in order to fully be able to absorb all nutrients in the later process. The resulting product after all the food’s been chewed is called the bolus. This food now starts to travel down
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1. Which of the following statements about the immune system is TRUE? A. Specific immune defenses are innate (pre-existing) B. Non-specific immune defenses are not innate: they are activated by exposure to foreign antigens C. Non-specific immune defenses require involvement of T-cells and B-cells D. Non-specific immune defenses include fever and the body’s inflammatory response E. None of the above 2. Which of the following does NOT occur during inflammatory
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Aquatic pollution is a worldwide problem that occurs every day in all bodies of water. Adedeji and Adetunji (2011) refer to aquatic pollution as an addition of hazardous substances‚ called pollutants‚ to these bodies of water. These pollutants are harmful to humans‚ but more importantly‚ they are extremely harmful to marine life due to the contamination of their habitats. Unfortunately‚ this occurrence is not uncommon‚ and it is mainly the result of human activities. Most pollution is derived from
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Checkpoint Chapter 23 1. Give the name and function of each of the four layers if the GI tract. A. mucosa; inner surface for the secretion of digestive end products. B. submucosa: site of glands‚ blood vessels‚ lymph vessels and nerve plexuses. C. muscularis: circular and longitudinal muscles for propulsion and mixing. D. serosa: serous membrane to reduce friction with movement. 2. Where along the GI tract is the muscularis composed of skeletal tissue? Is control of this skeletal muscle‚ voluntary
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LAB PRACTICAL 2 * Skin * Comprised of all 4 main tissue types * Epithelial * Connective * Muscular * Nervous * Part of the integumentary system * Function: * Protection * Body temperature regulation * Vitamin D synthesis * Sensation to touch‚ pressure‚ pain and temperature * 2 main regions: * epidermis * 5 strata * corneum
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enough pieces so that i can fit down the throat. As the teeth do their work‚ saliva mixes with the pieces of me‚ making me soft and moist. The saliva contains a chemical called salivary amylase‚ which starts breaking down complex carbohydrates‚ and another called mucin‚ which helps to soften the food. The amylase enzymes turn the starch molecules found in me into glucose. The glucose is used by cells to give people energy. oklahoma4h (2015) ptonthenet (2015) bbc.co.uk (2015) The tongue which is
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