EXPERIMENT NO. 12 DIGESTION IN THE STOMACH ABSTRACT____________________________________________________________________________ Digestion refers to the mechanical and chemical breakdown of food into smaller components that can undergo absorption. The objective of this experiment is to investigate mainly the process of digestion in the stomach. The conditions at which the enzymes responsible for the digestion process were determined. Also‚ the total and free acidity of gastric juice of the sample
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body. You might find yourself asking‚ what does blood have to do with digestion‚ respiration and circulation? Hopefully‚ after the presentation all of your questions will be answered. When a person thinks of digestion they usually think about what happens in the stomach. A lot has happened to digest the food way before it gets to the stomach. It starts in the mouth or oral cavity. It is a process called mechanical digestion. First‚ Mastication begins. Mastication is the chewing of the food
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Digestion and Nutrients Briana Smallwood The human body needs nutrients for it to survive. Nutrients are the fuel for the body to do work. It helps the body grow‚ provide protection from sickness and disease‚ function properly‚ and even live. There are many types and forms of nutrients that each do specific or multiple jobs. They are classified in six main groups. Carbohydrates‚ proteins‚ fats‚ vitamins‚ minerals and water are all the different groups. Proteins are nutrients that help build and
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Define the following terms: Digestion: Digestion is the breakdown of large insoluble food substances in small and soluble one by means of mechanical and chemical actions. Peristalsis: It is a series of alternate contraction and relaxation of the circular and longitudinal muscles‚ producing a wave-like motion to move food down the oesophagus‚ from the mouth to the stomach. Emulsification: It is the hydrolysis of a few large fat globules into many small and soluble fat molecules. Transpiration:
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6.1.1 Explain why digestion of large food molecules is essential. There are two reasons why the digestion of large food molecules is vital. Firstly‚ the food we eat is made up of many compounds made by other organisms which are not all suitable for human tissues and therefore these have to be broken down and reassembled so that our bodies can use them. Secondly‚ the food molecules have to be small enough to be absorbed by the villi in the intestine through diffusion‚ facilitated diffusion or active
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Lab 8 - Chemical and Physical Processes of Digestion (p.105) Introduction: In this lab‚ I will study how digestion of carbohydrates‚ proteins‚ and fats occurs. I will define Key Terms that describe what will occur in the experiments; I will conduct an experiment for each Activity and provide all resulting Data as well as answer Questions from each Activity. I will then provide a short Summary for what I learned in each Activity. Key Terms: Enzymes (p. 105) – Speed up chemical
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11 Digestion 1 Which one of the following structures is not part of the alimentary canal? (a) duodenum (c) liver (b) mouth (d) stomach: 2 Name two digestive glands. 3 What name is given to the muscular contraction which moves food along the alimentary canal? 4 What do digestive enzymes do to food? 5 What are the final digestion products of (a) protein‚ (b) fat‚ (c) starch? 6 How does chewing food help to speed up digestion? 7 Name the enzyme
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Test for Starch Introduction and Hypothesis: In this experiment‚ we used iodine to test for starch in certain solutions. Iodine separates starch from polysaccharides‚ monosaccharides‚ and disaccharides. Starch is a curled polymer of glucose and iodine interacts with molecules‚ which changes the color of the molecules to a kind of black color. Iodine does not respond with carbohydrates that are not curled or coiled‚ thus the color stays yellowish brown. A black color result means that starch is current
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University of Phoenix Material Human Digestion Worksheet The Digestive System and its Functions Review the diagram located on p. 1. In the space provided below‚ write the name of each organ or part‚ and explain the function of each one as it relates to digestion and absorption. Explanations must be written as complete sentences. Please make sure that you identify each organ or part below with the corresponding number located in the diagram. DIGESTIVE ANATOMY FUNCTION 1 Mouth The mouth
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How does pH affect the activity of the Amylase? Abstract: In my experiment I aimed to observe how ranging pH levels will affect the rate in which amylase will break down the starch molecules. I will be measuring the time it takes for the dark liquid to disappear and leave a yellow brown liquid to be shown‚ which would show that there is no starch present in the solution because it would have broken into maltose by adding amylase. Results did not fully demonstrate what we expected in our hypothesis
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