SYSTEM The process of digestion can be fast‚ or can take some time depending on what a person has eaten. The time frame can also be affected by the person’s activity level. Food which is taken through the mouth is initially broken down by mechanical means. The teeth are responsible for grinding food‚ while the tongue assists the mixing of the food with saliva‚ which is secreted by the salivary glands‚ thereby initiating the chemical digestion of carbohydrates. This
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Wine? Whiskey? Beer5% - Wine15% - Whiskey45% 2. What does BAC stand for? Blood Alcohol Concentration. 3. Describe the processing of alcohol from digestion to absorption. 20% is absorbed by the stomach the remaining 80% is absorbed in the small intestines. 4. What is alcohol effect on digestion and liver? Alcohol can stop digestion and increase hydrochloric acid production. Alcohol also causes a drop in blood sugar which can lead to a hypoglycemic state. 5. Name some factors that
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the greater interest. If it is desired to measure either organic or inorganic COD alone‚ additional steps not described here must be taken to distinguish one from the other. COD is a defined test; the extent of sample oxidation can be affected by digestion time‚ reagent strength‚ and sample COD concentration. COD often is used as a measurement of pollutants in wastewater and natural waters. Other related analytical values are biochemical oxygen demand (BOD)‚ total organic carbon (TOC)‚ and total oxygen
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on both the organic and inorganic component but as the organic component is more dominant‚ it is of more significant interest.In the COD test‚ the amount of oxidation that takes place depends on sample COD concentration‚ digestion time and reagent strength. It gives a measurement for the total organic carbon present in the sample.The open reflux test can be used for a large range of wastes‚ but results in hazardous wastes such as mercury and sulphuric
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The Circulatory System The Circulatory System is designed to deliver oxygen and nutrients to all parts of the body and pick up waste materials and toxins for elimination. This system is made up of the heart‚ the veins‚ the arteries‚ and the capillaries. Circulation is achieved by a continuous one-way movement of blood throughout the body. The network of blood vessels that flow through the body is so extensive that blood flows within close proximity to almost every cell. Heart The heart
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There are three phases for muscle cell contraction: initiation of action potential in the sarcolemma‚ excitation-contraction coupling‚ and contraction‚ sliding of the myofilaments. ATP and calcium ions are two essential elements for muscle contraction. When ATP attaches to the myosin head‚ it gets hydrolyzed to ADP and Pi. Calcium ions bind to the troponin molecules and help expose the binding sites of actin filaments to allow for the attachment of the myosin heads. After the sliding of the myofilaments
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Body Part Function Mouth Entrance point for food; initiates the digestion process. Tongue Contains taste buds; aids in chewing and swallowing Salivary Glands Parotid: limit the extent of swelling when they are inflamed. Sublingual: produce mucin which is found in saliva. Submandibular: produces 70% of saliva made in the body. Pharynx Carries air to the trachea; carries food to the esophagus. Esophagus Carries bolus from mouth to the stomach. Cardiac Sphincter Prevents backflow of food
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BIOS256Week1Lab1EXERCISE Mechanical Digestion in the Gastrointestinal Tract Directions: a. Click the Contents button. b. Open the Digestive System File. c. Click Animations. d. Click Mechanical Digestion in the Gastrointestinal Tract. Introduction 1. Define the gastrointestinal tract (GI). The GI tract is the stomach and intestine divided up into the upper and lower GI 2. Identify three mechanical digestion activities. a. Chewing b. Mixing food and saliva with
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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 of food are best accomplished by the action of the: Answer: bicuspids
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Metabolism refers to all the chemical reactions in the body of a cell or organism to keep it alive. Metabolism converts the nutrients from the food we eat in to vital energy which the body needs to carry out daily activities. The respiratory system‚ cardiovascular system and the digestive system are the three body systems that are involved with energy metabolism. There are two kinds of activities involved with metabolism processes‚ these are; building up of body tissues and energy stores and the
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