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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Blue coloration turned to brick red precipitate. Reducing sugar is present in the solution A. Iodine test: The coloration remained unchanged. Starch is absent in solution A. Solution B Benedict’s test: The blue coloration remained unchanged. Reducing sugar is absent in solution B. Iodine test: The coloration turn into dark blue coloration. Starch is present in solution B. Table 2: Tube Contents Temperature(°C) Benedict’s Test-Colour Observation After min 5th min (from tubes 1
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Referring to the table above‚ specifically state where in the intestine sucrase is likely most active. duodenum 20. Salivary amylase‚ an enzyme in saliva that breaks down starch‚ has an optimal pH of 6.7- 7.0. Explain why salivary amylase is active in the mouth‚ but becomes inactive in the stomach. Salivary amylase is an enyme that’s active in the mouth in order to break down starch into glucose it carries it function out in the environment where the PH is 6.7- 7.0 however activity decreases are the
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tongue occupies the floor of the mouth. The salivary glands have ducts that open in the mouth. Function: The mouth is where the first step of digestion begins. Known as mechanical digestion‚ this involves chewing with your teeth to break the food into smaller pieces. The tongue moves the food around to assist chewing and together with saliva‚ the food is lubricated for ease of swallowing. Salivary glands Structure: There are three main parts of salivary glands: the parotid‚ the submandibular
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activity of the starch-digesting enzyme‚ amylase. When the diet pill binds to the amylase‚ it prevents the breakdown of starch. In the Biology 1103 lab‚ we conducted two experiments to determine whether or not the diet pill‚ Carb Cutter‚ actually worked. In each experiment we used an experiment tube and a control (blank) tube. The purpose of a blank is to set a base level (zero) from which other measurements can be performed. In the first experiment we were trying to see if the amylase would digest
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The body is made up of a number of systems that all interlink and produce everything we need in order to survive. Within the body there is the digestive system; the circulatory system‚ the nervous system‚ the muscular system‚ the skeletal system and the reproductive system. These systems are all part of one another and they share organs‚ tissues and cells and that is how they interlink. The diagram above shows each system and where they are located in the body. Each system is shown in a different
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Principles of Human Physiology‚ 4e (Stanfield) Chapter 20 The Gastrointestinal System 20.1 Multiple Choice Questions 1) Which of the following is NOT a basic process of the gastrointestinal system? A) digestion B) filtration C) absorption D) secretion E) motility Answer: B Diff: 4 Page Ref: 568 2) Which of the following is the correct order of the layers of the gastrointestinal tract wall‚ from lumen to external surface? A) mucosa submucosa muscularis externa serosa
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of the alimentary canal. The function of the alimentary canal is to provide nourishment. The teeth‚ tongue‚ gallbladder‚ salivary glands‚ liver and pancreas are considered to be accessory digestive organs. These organs produce saliva (salivary glands)‚ bile (gallbladder and liver) and digestive enzymes which contribute to the breakdown process of food. Mechanical digestion begins with the process of taking food into the mouth or ingestion and chewing it until it can be moved through the alimentary
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CHEMICAL AND PHYSICAL PROCESSES OF DIGESTION - ANSWERS Please note: I do not include the charts as you still have to do the experiments and print the data and graphs. Activity 1 What do tubes 2‚ 6‚ and 7 reveal about pH and amylase activity? Hint: What variable was changed in the procedure? a. maximum of amylase is at pH 7.0 (tubes 2 & 5‚ brownish red) and pH 9.0 showed little activity (tubes 6 & 7‚ green) Which pH buffer allowed the highest amylase activity? a. 7.0 Which
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Table 1 : The presence of starch and reducing sugar in the solution Observation Conclusion Solution A Benedict’s test : The transparent blue solution turns into opaque brick-red precipitate Iodine’s test : The clear colourless solution turns into transparent yellowish-brown solution. The pure colour of the solution is clear colourless solution and the transparent yellowish-brown colour is the iodine’s colour. There is presence of reducing sugar whereas absence of starch Solution B Benedict’s
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