different reactions. The table below shows three enzymes and which reaction they catalyse. Enzyme Reaction catalysed Amylase Starch → sugars Protease Proteins → amino acids Lipase Lipids → fatty acids + glycerol Different parts of the gut produce different enzymes. The table below shows where three different enzymes are produced. Enzyme Where produced Amylase Salivary glands‚ pancreas‚ small intestine Protease Stomach‚ pancreas‚ small intestine
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-When food arrives in the stomach‚ it is reduced to fragments. This step is made possible by the contraction of the muscle of the stomach‚ the muscularis. Composed of three layers of fibers arranged longitudinally‚ circular and oblique‚ it mixes and kneads the food. Then begins the chemical digestion. Only the digestion of proteins begins in the stomach. The mucosa contains glands that secrete gastric juices. Under normal conditions‚ the production of juices is 2 to 3 L per day. Hydrochloric acid
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Enzymes and Their Importance in Plants and Animals Enzymes are large proteins that are responsible for catalysing thousands of metabolic processes that sustain life. Enzymes work similarly to those catalysts used in industry by lowering activation energy and therefore dramatically speeding up the rate of a reaction‚ however‚ these biological catalysts are highly selective to their substrate. Almost every chemical reaction that occurs in a cell requires enzymes in order to occur at rates required
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large food molecules to smaller ones. When food enters the mouth‚ digestion of the food starts by the action of mastication‚ a form of mechanical digestion‚ and the wetting contact of saliva. 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 and
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Week 7 Digestion Lecture Study Guide Based on information found in the lecture folder or other sources‚ answer the following questions. 1. What is digestion? Digestion is the mechanical and chemical breakdown of food into usable molecules 2. List some other names of the digestive tract. Alimentary Canal (GI Tract) 3. Explain where and how the mechanical breakdown of food occurs. Teeth begin digestion mechanically‚ Chewing (“mastication”) breaks apart food‚ 2 sets
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carbs Polysaccarides Long chains linked tpgether Complex Starch Storage in plants Amylose straightchains of glucose unit Amylopectin branches out nota single chain glycogen in animals Fiber Amylopectin h a s more exposure to the amylase Fiber fermentation? Happens in large intestine Ie :Cellulose hemicellulose foundin plants stalks
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colon moving the contents of the colon toward the sigmoid colon are called: Answer: mass peristalsis 7. Which of the following salivary glands produce salivary amylase‚ a carbohydrate-digesting enzyme? Answer: 1. parotid glands 2. sublingual glands 8. Which of the following is not a function of saliva? Answer: initial digestion of proteins 9. The three pairs of salivary glands that secrete into the oral cavity include: Answer: parotid‚ sublingual‚ and submandibular 10. Crushing‚ mashing‚ and grinding
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ON THE RATE OF ENZYME ACTIVITY. To investigate the effect that temperature has on enzyme activity I am going to use the enzyme amylase‚ which is used as a biological catalyst to break down starch‚ which cannot pass through the gut wall due to the size of the molecules‚ into smaller ones. Amylase is a carbohydrase‚ which converts starch to simple sugars in the Salivary Glands. Three features of all enzymes are: They are always proteins. They are specific in their actions and each enzyme controls
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briefly explain the process of digestion in ruminants Asked by ANUSHA SHISHIR PA... 3 days‚ 1 hour ago Subject:Science 3 Answers The procees of digestion is completedd through four chambers 1)Rumen 2)Reticulam 3)omasumn 4)abomasum In the first two chambers‚ the rume and the reticulum‚ the food is mixed with saliva and separates into layers of solid and liquid material. Solids clump toget her to form the cud or bolus. The cud is then regurgitated and chewed to completely mix it with saliva and
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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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