1. Discuss the relationship between distribution of muscle fiber type and performance. How might exercise training modify or change a person’s fiber-type distribution? Skeletal muscles contain multiple fiber types that are distinguished by their different myosin ATPase speed‚ and the development of their SR. The two main fiber types are type I and type II fibers. Type II fibers have a faster ATPase and a more developed SR than type I fibers. Type II fibers are also part of a larger motor unit‚
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Experiment 2: Skeletal Muscle ABSTRACT Frog skeletal muscle is used as an animal model to study muscle contraction. The objectives of this experiment is to demonstrate the physiological responses of skeletal muscle to electrical stimuli using frog gastrocnemius‚ to understand twitch‚ summation‚ tetanus and fatigue‚ to investigate the relationship between initial tension and force of contraction‚ to explore the differences between human and frog skeletal muscle. The threshold voltage is 0.4V. The
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Muscle Fatigue Monira Begum How muscles work and get the energy they need to work. Muscles need energy to work and move. (1) Their main source of energy is glucose. Glucose is made of a number of different types of carbohydrates (usually sugar) as well as milk and fruits. Glucose turns into other chemicals such as water and carbon dioxide which releases energy. (2)Your muscles get warm when using or burning energy. Glucose is sent to muscles through red blood cells; this is how muscles get
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Orthopedic - Muscular 1)The muscle that runs on a diagonal from the lower ribs to the iliac crest is the: A)rectus femoris muscle. B)external abdominal oblique muscle. C)latissimus dorsi muscle. D)rectus abdominis muscle. 2)The patient with cerebral palsy was described as having ataxia. This means that the patient: A)has slow skeletal muscle movements of his upper extremities. B)has slow‚ purposeless writhing of his hands. C)walks with an uncoordinated gait. D)has muscle jerking and spasms when
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Exercise 8 Simple Muscle Contraction • 3 Phases AB - lag phase or latent phase - (shortest) 0.00sec‚ usually less than 0.01sec - brief period that exists between the application of the stimulus and the start of contraction BC - contraction‚ 0.05sec - peak - shortening of the muscle occur CD - relaxation period‚ 0.05 sec - Occurs when Ca+ is transported back in the sarcoplasmic reticulum Single muscle contraction= 100vib/sec (tuning fork)= 0.10 sec 10vib (result) Neuromuscular junction - formed when
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Abstract The purpose of this experiment was to use the muscle tension and the electrical activity in the dominant and non-dominant forearm muscle‚ the flexor digitorum superficialis‚ to analyze the determinants of muscle tension and fatigue‚ and the reasons as to why differences may occur between the dominant and non-dominant arm. The generation of tension in a muscle is determined by the major type of motor unit being recruited‚ as well as the rate in which action potentials are being fired. A subject
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working conditions in northeastern factories was sad‚ they was very dangerous and not safe in any way. Corruption and abuse was frequent also in working conditions and very few workers worked their way to poverty‚ it seemed impossible to so with the way things were going. Workers were doomed to repeat dull repetitive tasks every single day‚ day after day and there were no labor laws. Child labor was common and for a worker that was injured‚ there was no compensation. Working conditions in the
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How important was the Second Boer War (1899-1902) in changing attitudes in Britain to imperialism during the period 1880-1902? The Boer War of 1899-1902 was vital in regards to changing attitudes towards British imperialism in the time period of 1880-1902‚ as despite the early populist view during the war seeming to be pro-imperialist‚ following notable events such as mafficking (1900) and potentially even the 1900 General Election‚ there was a real sense of antagonism towards the brutal methods
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According to the Australian War Memorial‚ “Over 30‚000 Australian servicemen were taken prisoner in the Second World War and 39‚000 gave their lives.” The treatment of POWs during the WW2 varied extremely depending on race‚ country they were prisoner to‚ morals and numerous other varying factors. The Geneva Conventions were set in order to control and maintain the same level of treatment for all POWs‚ they were international agreements created in Geneva‚ Switzerland. The Conventions place restrictions
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The noise generated by windfarms is a very important parameter to be studied in the design phase. Sound propagation models like ISO 9613-2 is commonly used in noise prediction studies due to its simple input parameters required but it does not take into account some factors that have a significant effects on the results such as wind velocity‚ wind direction and some weather conditions like temperature gradient. Also it assumes the condition of downwind in all directions. So‚ the calculations can
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