ABSTRACT The small intestine serves as the site of major digestive and absorptive processes. In this experiment‚ the action of pancreatic enzymes on representative samples of each food group under different conditions‚ such as increased/decreased pH and presence of other substances‚ were observed. A pancreatin solution was first prepared from a hog pancreas and was completely neutralized using 0.5% Na2CO3. Afterwards‚ 3 mL each of the neutral pancreatin solution was placed in 7 test tubes and were
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Biology Form Four Digestion Digestion is the process by which food is broken down from complex insoluble substances into simple soluble substances. There are two types of digestion – chemical digestion and mechanical digestion. Mechanical digestion involves breaking up large pieces of food into smaller pieces. This provides a large surface area for the action of enzymes on food. There is no change to the chemical composition of food during mechanical digestion. Mechanical digestion occurs in
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Title: Investigation of action of saliva and hydrochloric acid in two carbohydrate solutions. Objective: To determine the action of amylase and hydrochloric acid in two carbohydrates solutions Apparatus and equipments: 1. Boiling tube 2. Metal test tube racks 3. Beaker 4. Graduated plastic dropper 5. Water bath‚ ~37ᵒC 6. Water bath‚ ~95ᵒC Materials: 1. Carbohydrate solution A 2. Carbohydrate solution B 3. Benedict’s solution 4. 3M Hydrochloric acid 5. 3M Sodium hydroxide Procedures: 1. Two
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What is the effect of pH on the activity rate of salivary amylase? Dependent variable: activity rate Independent variable: pH Hypothesis: This is a paragraph or two where you explain your research question. You are going to say something like: "Salivary Amylase is a an enzyme that digests starch into di- and monosaccharides. Since it’s a salivary amylase‚ the enzyme works best at an alkaline pH of 7‚ in other words‚ the optimum pH is 7. At this pH‚ the rate of amylase activity will be at it’s
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effect of pH on amylase activity. The results of this experiment indicate that the activity maximum of amylase is at pH 7.0‚ whereas pH 2.0 and pH 9.0 demonstrated very little activity. In this experiment‚ pH 7.0 showed the highest level of amylase activity. Tube 3 showed that amylase did not contain maltose contamination. Tubes 3‚ 4‚ and 5 showed that water had no starch or maltose contamination. Tube 3 directly showed that water did not have maltose or starch contamination. Tube 4 was a starch control
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The Effects of Temperature on the Action of Diastase on a Starch Suspension Hypothesis: The practical being carried out is to observe the effects of temperature on starch break down using a synthesized version of salivary amylase‚ this being Diastase. The starch will be placed into the Diastase and water and then placed in baths of water of different l. temperatures. The test tube containing water will have little or no reaction at all. However‚ the test tube containing the Diastase
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proteins‚ fats‚ and carbohydrates. 4. To perform the appropriate chemical tests to determine if digestion of a particular food has occurred. 5. To cite the function(s) of bile in the digestive process. 6. To discuss the possible role of temperature and pH in the regulation of enzyme activity. 7. To define enzyme‚ catalyst‚ control‚ substrate‚ and hydrolase. 8. To explain why swallowing is both a voluntary and a reflex activity. 9. To discuss the role of the tongue‚ larynx‚ and gastroesophageal sphincter
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PressReleasePing Alfred Culbreth Announces L’Alpina Spring Water 7.3 pH Makes Waves at Kia Malibu Estate! Alfred Culbreth‚ is CEO of American Premium Water Corporation "APWC" (OTC: HIPH) American Premium Water Corporation "APWC" (OTC: HIPH) www.americanpremiumwater.com is excited to provide the following update to the investment community and our shareholders. Delray Beach‚ FL‚ July 09‚ 2014 /PressReleasePing/ - American Premium Water Corporation "APWC" (OTC: HIPH) www.americanpremiumwater
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enzymes in the process of digestion of proteins‚ carbohydrates and lipids in humans. (Total 6 marks) 4. Draw a labelled diagram of the digestive system. (Total 5 marks) 5. State the sources‚ substrate‚ product‚ and optimum pH conditions for the enzyme amylase. (Total 4 marks) 6. Describe the role of enzymes in digestion with reference to two named examples. (Total 5 marks) 7. What sequence of organs do substances pass through‚ as they move through the human digestive system
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the activation energy for the reaction. 5. Work at body temperature. 6.1.3 State the source‚ substrate‚ products and optimum pH conditions for one amylase‚ one protease and one lipase. Amylase Protease Lipase Enzyme Salivary Amylase Pepsin Pancreatic Lipase Source Salivary Glands Chief cells in stomach lining Pancreas Substrate Starch Proteins Triglycerides such as fats and oils
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