The study of aging‚ which is known as gerontology‚ (Non-restrictive) has particularly progressed (Present Perfect)in recent years. Scientists have been trying (Present Perf. Prog) to develop theories of aging for centuries‚ and neither of them has been accepted. There are two main categories of aging theories‚ such as programmed theories and damage theories. Programmed theories say that life expectancy is genetically (present passive)predestined. According to the Hayflick Limit Theory‚ humans cells
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What would you do if at the age of one years old you started to look like a decaying human being? One in eight million children face this problem. The disease is called Progeria (also known as Hutchinson-Gilford Progeria Syndrome.) Progeria is a very rare terminal condition. Progeria‚ affects both males and females of all ethnic backgrounds. The term Progeria comes from the Greeks and it means "prematurely old". In the following paragraphs I will be discussing symptoms of Progeria‚ treatments‚ and
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What is ‘disease’? Definition The term disease is the condition of the living‚ which leads to a disorder of the mind or body‚ which therefore destroys good health. (S-Cool A-Level). Biology online states that disease is a ‘pathologic condition in which the normal functioning of an organism or body is impaired or disrupted‚ resulting in extreme pain‚ dysfunction‚ distress or death.’ (Biology Online) Disease throughout History Over the years‚ there has ‘been a gradual decline in mortality from all
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Progeria‚ meaning "before" or "premature"‚ and "gēras"‚ meaning "old age". The disorder has a very low incidence rate‚ occurring in an estimated 1 per 8 million live births. Those born with progeria typically live to their mid teens to early twenties. It is a genetic condition that occurs as a new mutation‚ and is rarely inherited‚ as carriers usually do not live to reproduce. Although the term progeria applies strictly speaking to all diseases characterized by premature aging symptoms‚ and is often
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In 1956‚ Denham Harman articulated the free radical theory of aging which states that ‘oxygen free radicals that are formed endogenously in live cells result in a pattern of cumulative damage’(9). The theory is also implied that the target of those radicals in the cellular system is random. In live cells‚ DNA‚ protein and lipid are targets for the free radical’s invasion. Damaging any of those vital macromolecules in live cell affects the physiology of the cell and may lead to apoptosis and cell
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Theories of Aging Papers: Harman’s Free Radical Theory of Aging Quynh Doan South State College of Florida Quynh Doan Abstract Aging the everlasting search for answers to a complex process of human naturalnature. So many theories have been formulated to try to explain the process‚ but the one I choose to focus on is the Free Radical Theory. Looking the basic concept‚ benefits‚ and limitations of the theory. I will also attempt to link the relationship of the Free Radical Theory to the new
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Prostate Cancer is the second most common cancer among men‚ after skin cancer‚ and is the leading cause of cancer death in men in the United States. Prostate cancer is caused by changes in the DNA of a prostate cell that turns off tumor suppressor genes and activate oncogenes. Essentially‚ cancer is an epigenetic programming problem. Epigenetics is the study of trait variations that are caused by factors that turn genes on and off and change how cells read genes. Immune evasion is when alterations
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Life Stages I will be explaining the physical and psychological changes which may be associated with ageing. Physical changes – skin‚ bones and joints * Skin becomes more wrinkled‚ thinner and less elastic. * Bones are less dense and are more likely to suffer from minor or serve injuries. * Joints stiffen and can be more painful as the bones thin out. * Muscles become weakened and loosen. * The spine may round which leads to hunched backs and other spine conditions. Senses:
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The word cancer is a word that has negativity written all over it. It’s a word with no positive upside and often makes most of us cringe. The word cancer is a Greek word and was first used by Hippocrates who used the words carcinos and carcinoma to describe tumors‚ later deeming the word “cancer”. Cancer is a condition in which relates to the cells within the human body‚ cells make up all living things. They grow‚ expand‚ divide
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Biological Theories of Aging Human Growth and Development Introduction Aging is a biological phenomenon all the living things are undergoing. We are not sure about anything in the world except the aging. We are approaching getting nearer to the death from the time of the birth onwards. No living thing in the world has the ability to defeat death as it occurs sometimes naturally and sometimes accidently. Aging has different dimensions like physical‚ psychological‚ and social. There are
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