in ability of a muscle to generate force. It can be a result of strenuous exercise but unusual fatigue may be caused by interference with the different stages of muscle contraction. There are two main causes of muscle fatigue‚ nervous fatigue and metabolic fatigue. Nervous Fatigue Nervous fatigue is the decline in the ability of a nerve to sustain a signal resulting in innervation of the muscle. The muscle’s ability to generate force is most strongly limited by nerve’s ability to sustain a high-frequency
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developmental defects of teeth with recent genetic concepts INTRODUCTION: Disorders of development of teeth may be prenatal or postnatal in origin and may be inherited or acquired. Their recognition and evaluation requires a thorough knowledge and evaluation of the normal chronology of the human dentition and of the normal development and structure of the teeth. Disorders of development of teeth of teeth may be due to abnormalities in the differentiation of the dental lamina and
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“The theme is an attempt to trace the defects of society back to the defects of human nature. The moral is that the shape of society must depend on the ethical nature of the individual and not on any political system however apparently logical or respectable. The whole book is symbolic in nature." — William Golding ------------------------------------------------------------------------------------------------------------------------------------------------------ In lord of the flies‚
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Casting Defects: Some defects are common to any and all process. These defects are illustrated in figure briefly described in the following: [pic] A) Misruns: A Misrun is a casting that has solidified before completely filling the mold cavity. Typical causes include 1) Fluidity of the molten metal is insufficient‚ 2) Pouring Temperature is too low‚ 3) Pouring is done too slowly and/or 4) Cross section of the mold cavity is too thin. b) Cold Shut: A cold shut occurs when two portion
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1. Defects of Timber A defect is an irregularity or abnormality occurring in or on wood which is responsible for its Strength reduction; Lowering of durability; Lowering of utility; Poor appearance; and‚ Decay Classification of Defects: a. Caused due to natural forces b. Caused due to insects c. Caused due to fungi d. Caused due to conversion e. Caused due to seasoning a) Defects due to natural forces: Chemical stain - the wood is sometimes discolored by the chemical action caused with it by some
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stage. These building problems are referred to as defects‚ depending on the type of contact most contracts have a 12 month defect period‚ this enables the users (and funders) to live in the building through the different seasons and see if any problems occur. A latent defect is after the 12 month defect period has lapsed and the new building shows signs of problems that are so significant that they can stop its functionality (a latent defect period can last up to 12 years on some contracts).
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Birth Defects A study funded by Monsanto to study possible birth defects caused by consuming aspartame was cut off after preliminary data showed damaging information about aspartame. Additionally‚ in the book‚ While Waiting: A Prenatal Guidebook‚ it is stated that aspartame is suspected of causing brain damage in sensitive individuals. A fetus may be at risk for these effects. Some researchers have suggested that high doses of aspartame may be associated with problems ranging from dizziness and
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removing heat and delivering nutrients and water. Therefore‚ blood flow is important in cellular respiration‚ which is the process where ATP is produced through the conversion of metabolites‚ also involving the consumption of oxygen and release of CO2 as a waste product. ATP is vital to skeletal muscle contraction‚ since the power stroke is facilitated by ATP binding to and being hydrolyzed by myosin‚ which pulls the actin filament inward. Since muscle cells respire and contract more during exercise
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Hypothesis: I hypothesis that the enzyme concentration will affect the rate of reaction but only up until a certain point because there is a limited supply of substrate. Enzymes are protein molecule that acts as biological catalyst by increasing the rate of reactions without changing the overall process. They are long chain amino acids bound together by peptide bonds. Enzymes are seen in all living cells and controlling the metabolic processes in which they converted nutrients into energy and new
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a) The ATP molecule is composed of three components. At the centre is a sugar molecule‚ ribose (the same sugar that forms the basis of RNA). Attached to one side of this is a base (a group consisting of linked rings of carbon and nitrogen atoms); in this case the base is adenine. The other side of the sugar is attached to a string of three bonded phosphate groups. These phosphates are the key to the activity of ATP. Especially‚ the bond between the last phosphate and second to last phosphate is
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