QUESTIONS 1. The smallest voltage required to produce a contraction was .85. The proportion of fibres in the muscle that were contracting was only 10-20% of total fibres available. The nervous systems controls the amount of muscle fibres that contract. In this case only a small depolarization is causes and this was evident in the graph produced 4) The all or none law states that strength of muscle force will be the same at any stimuli strength if the stimuli strength is above the threshold
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The paper by Aoba and Fejerskov written in 2002 talks about a hypothesized mechanism being a dose-related disruption of the mineralization which causes the teeth to become porous with a decrease in proteins. This degradation of the teeth is thought to be from a breakdown of the matrix proteins and the way the by-products are drawn out from the aging enamel (Aoba and Fejerskov, 2002). There are different forms categorizing the severity of enamel fluorosis. Mild enamel fluorosis is seen as white striations
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biological system may have. This exposure of toxic substances for shorter duration and the diverse effect is high • Sub-chronic toxicity. This group results from exposure that is recurring numerous times. It is an ordinary human exposure type that occurs due to some pharmaceuticals or environmental agents. • Chronic toxicity. This relates to exposure of toxic substances for longer duration and the diverse effects are low. For instance, chronic bronchitis for tobacco addict and cirrhosis for alcohol addict
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MT302-02: Organizational Behavior Unit Two: Job Satisfaction, “Choosing a Job that Works for You” January 15, 2013 Unit Two: Job Satisfaction, “Choosing a Job that Works for You” There are several things that are important to me when job hunting. The top five for me are job security, career advancement, great health benefits, commute (drive time) and income potential. These five things I believe are the most important to anyone in the job market needing to provide for themselves and/or
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comorbidity. Since opioids used in pain therapy rarely cause any of these conditions, they are assumed to have existed prior to the development of dependence. Opioids are known to have strong antidepressant anxiolytic and antipsychotic effects and thus opioid dependence often develops as a result of self-medication. Opioids are excellent acute pain medication, but it is their ability to produce euphoria that makes them attractive to addicts. The adverse effects of the heroin are very dangerous like the risk
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Michael Howard Professor Oltmann BIO 1322 June 26, 2015 Chapter 10 (10.1) Oxidation and Reduction Oxidative Stress- The imbalance between the point the production of reactive compounds and the body’s ability to protect against their adverse effects. Oxidation- The process of losing an electron during a chemical reaction. Free radical- An unstable atom with an unpaired electron in its outermost shell. 10.2 Defense Against Free Radicals Antioxidant- A substance that has the ability to prevent
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Five Ways to Increase Hair Growth Naturally To increase hair growth from the root, you must look at the root cause! Hair Loss, what’s it good for? I know the struggles of loosing your hair. As a teen, arguably the when hair is most important I experienced the struggle, because of my lifestyle and nutrition. I was also on medication. When I decided to make changes to these three, I was able to feel “normal” again as I got new hair growth. We all have our own recipes to healthy hair growth. This
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Improving Outcomes in Sepsis Patients in the Emergency Department Sepsis is a left threatening illness that affects millions of people each year. The Center of Disease Control reports sepsis as the 10th leading cause of death in the United States (V). For adults age 65 and over hospital admission because of sepsis have increased 48%. The body’s immune system switches into “high gear” which overwhelms the body’s normal blood flow and oxygenation of tissues throughout the body. This process,
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A2 Biology Unit 5 page 1 AQA A2 Biology Unit 5 Contents Specification Human Nervous system Nerve Cells The Nerve Impulse Synapses Receptors Muscle Animal Responses Control of Heart Rate The Hormone System Homeostasis Temperature Homeostasis Blood Glucose Homeostasis Control of Mammalian Oestrus Plant Responses The Genetic Code Protein Synthesis Gene Mutations Stem Cells Control of Gene Expression Biotechnology DNA sequencing Southern Blot In vivo cloning Genetically Modified Organisms Gene
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Brain Disorders Traumatic Brain injury: Is an injury also known as TBI, a form of acquired brain injury, occurs when a sudden trauma causes damage to the brain. Causes: TBI can be caused by the head suddenly and violently hitting an object, or when an object pierces the skull and enters brain tissue. Symptoms: Symptoms of a TBI can be mild, moderate, or severe, depending on the extent of the damage to the brain. A person with a mild TBI may remain conscious or may experience a loss
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