food and help your body absorb the nutrients from this food. The digestive system is made up of the digestive tract‚ which includes the esophagus‚ stomach and intestines and other organs that aid in digestion such as the liver‚ pancreas and gall bladder. The breaking down of food for digestion begins in your mouth. As you eat something‚ your teeth break down the food‚ and your saliva helps to breakdown and it moistens the food so you can swallow it easily. Saliva also turns sugars into starch
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Enzymes All enzymes are globular proteins and round in shape They have the suffix "-ase" Intracellular enzymes are found inside the cell Extracellular enzymes act outside the cell (e.g. digestive enzymes) Enzymes are catalysts → speed up chemical reactions Reduce activation energy required to start a reaction between molecules Substrates (reactants) are converted into products Reaction may not take place in absence of enzymes (each enzyme has a specific catalytic action) Enzymes catalyse
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bolus (lumps of food) squeezes past the epiglottis then down the oesophagus which connects the throat to the stomach. The bolus then enters the stomach where gastric juices are produced by the walls of the stomach. The protease‚ pepsin‚ starts the digestion of proteins to smaller molecules called polypeptides. Hydrochloric acids break the food down further and kills all the bacteria. The stomach then churns everything together (food‚ gastric juices and hydrochloric acid) into a squishy mush; this process
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TOPIC 6‚ 11‚ & OPTION H: HUMAN HEALTH AND PHYSIOLOGY Digestive System Includes all the structures that are concerned with bringing food into the body to provide for the needs of the body’s cells. Each cell in an organism relies on a continuous expenditure of energy. Fats‚ carbs‚ and proteins are broken down during cellular metabolism and the energy derived from them is used to make ATP. The digestive system deals with: Ingestion‚ which is the bringing of nutrients into the body. Mechanical
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with Carb Cutter as opposed to the one without it. This however was not the case. The level of starch concentration was digested at a similar pace for each tube. The results following were that the tube with the Carb Cutter had the same rate of digestion‚ as did the tube without the carb cutter. This graph is a depiction of the decrease in the level of starch as time goes on for
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digest our food?” and more importantly “how does it support this acid without being dissolved?”. Well all theses questions will be answered. To answer the first question‚ the Hydrochloric Acid in our stomachs has a very important role for our digestion. It alters the natural qualities of the proteins in our food which makes them vulnerable when they’re attacked by an enzyme named pepsin. (Pepsin from the Latin word pepti which means digested) It also kills the bacteria that can be found in your
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the functions the organ systems would perform. For example‚ in reality‚ the functions of the digestive system are to capture and physically or chemically disintegrate food‚ absorb‚ detoxify‚ alternate‚ store and control the release of products of digestion and metabolism. Using a paramecium as the representative ciliated protozoa‚ the digestive system can be replaced with the oral groove‚ mouth pore‚ gullet‚ developing food vacuole‚ circulating food vacuole and anal pore. Food particles enter the ciliated
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big difference. The weight of the intestines in large dogs makes up about 3% of their entire body weight‚ while the weight of the intestines in smaller dogs is about 7% of their body. This creates an issue because there is less intestinal area for digestion and the absorption
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include the teeth‚ tongue‚ salivary glands‚ liver‚ gallbladder‚ and pancreas. To achieve the goal of providing energy and nutrients to the body‚ six major functions take place in the digestive system: Ingestion Secretion Mixing and movement Digestion Absorption Excretion AILMENTS 1. INDIGESTION – refers to the discomfort felt in the upper stomach . SYMPTOMS : Bloating (full feeling) Belching and gas Nausea and vomiting Acidic taste Growling stomach Burning in the stomach or upper abdomen
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cephalic phase. 10. *Now would be a great time to fill in the interactive table on page 7 of the Motility topic. 11. The cephalic phase of digestion is regulated by short reflexes a. True b. False. 12. The vagus nerve carries electrical signals from the brain to the stomach. 13. The hormone gastrin regulates gastric secretion during the gastric phase of digestion. 14. Gastric motility increases as the stomach begins to receive food. 15. The hormone CCK released by the duodenum cause gastric motility
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