Experiment #1: Carbohydrate Digestion • Tube 1 Digestion Lab – 3 ml water • Tube 2 – 3 ml 0.2% amylase • Tube 3 – 3 ml 0.2% amylase + 10 drops of 1.0M HCl • Tube 4 1 2 4 3 – 3 ml 0.2% amylase – place in hot water bath for 5 min Experiment #1: Carbohydrate Digestion • Add 5.0 ml starch solution to each tube • Incubate in 37°C bath for 1.5 hr • Divide contents of each tube evenly into 2 tubes – Lugol’s Test – Benedict’s Test Experiment #1: Carbohydrate
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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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Ye Tao BISC220-13155 The Effect of Temperature on the Digestion of Starch by Activity of Enzyme α-Amylase: Observation of Rate of Starch Disappearance through Iodine Test Introduction An enzyme is a type of protein that‚ through its own structure including hydrogen bonds‚ acts like a biological catalyst and is able to accelerate the biochemical reaction rate by lowering the activation energy of the whole process‚ without which cells could hardly practice any physiological functions within human
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and use their teeth to break down their food. With the help of saliva produced by the salivary glands‚ which produce enzymes‚ food is able to be broken down further. This is also the place where ingestion takes place” “What are enzymes” “Enzymes are very efficient catalysts for biochemical reactions. In the mouth there’s an enzyme that will help your food undergo chemical digestion” “What is it” “It is amylase. Which help digest starch into smaller molecules. This enzyme will help break down the
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number of structures (connective tissue‚ blood vessels‚ and nerve fibers) collectively called pulp. Root Canal- Provides a route for blood vessels‚ nerves‚ and other pulp structures to enter the pulp cavity of the tooth. Salivary Glands * Three pairs of salivary glands empty their secretions into the mouth. Parotid glands- lie anterior to the ears. Mumps- a common childhood disease‚ is an inflammation of the parotid glands. * Submandibular glands and Sublingual glands empty their
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LABORATORY REPORT (Click on the Save a Copy button on the panel above to save your report) Activity: Name: Instructor: Date: Enzyme Activity cheryl yelton November 30‚ 2014 Predictions 1. Sucrase will have the greatest activity at pH 6 2. Sucrase will have the greatest activity at 40 °C (104 °F) 3. Sucrase activity increases with increasing sucrose concentration. Materials and Methods Effect of pH on Enzyme Activity. 1. Dependent Variable. amount of product (glucose and fructose) produced 2.
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change shape / enzyme is denatured Charges on amino acids can change‚ ES complex cannot form Optimum pH pH 7 for intracellular enzymes Acidic range (pH 1-6) in the stomach for digestive enzymes (pepsin) Alkaline range (pH 8-14) in oral cavities (amylase) Increased Temperature Increases speed of molecular movement → chances of molecular collisions → more ES complexes Enzymes have optimum temp. for their action (varies between different enzymes) Above ≈42°C‚ enzyme is denatured due to heavy
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by the action of 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
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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 food. The names of enzymes that help in digestion are: •Amylase: This enzyme helps in breaking down carbohydrates. It is found in saliva‚ pancreas and intestinal juices. •Proteases: It helps in digestion of proteins. It is present in the stomach‚ pancreatic and intestinal juices. •Lipases: Lipases assist in digestion of fats. It is seen in the stomach‚ pancreatic juice and food fats. Amylase I and II are secreted by the salivary glands initially and then by the pancreas. They break the bonds
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