Wear and tear theory of aging pdf files

The wear and tear theory of aging believes that the effects of aging are caused by damage done to cells and body systems over time. National council on aging fact sheet f or most older adults, good health ensures independence, security, and productivity as they age. The wear and tear theory of aging, one of several theories, asserts that the effects of aging are caused by progressive damage to cells and body systems over. Assistant professor of medicine division of geriatric medicine fellow, institute on aging. This theory assumes that during aging vital parts of cells and tissues wear out resulting in the aging process and ultimately death. Physiologic processes that may explain aging include oxidative stress, immunologic, neuroendocrinologic, metabolic, and insulin signaling, and caloric restriction. An introduction to biological aging theory pdf azinet. Aging itself is a leading cause of oa and its estimated that a third of people age 65 and older have osteoarthritis. Abstract to aid healthcare professionals in product selection specific for skin tears, the international skin tear advisory panel conducted a.

In comparison with other species of mammals, the human being has the longest life span. The cellular senescence theory of aging posits that organismal aging is a consequence of the accumulation of less physiological useful senescent cells. The word senescence can refer either to cellular senescence or to senescence of the whole organism. Cells and tissues have vital parts that wear out resulting in aging. Autoimmune theory, cross linkage theory, free radical theory, antagonistic pleiotropy, and the microbiome perspective.

The wearandtear theory, error catastrophe theory, the free radical theory, dna damage hypothesis, loss of adaptive cellular mechanisms, the. The effect of autologous and environmental wear and tear on genes and gene products will be considered in systems renewed by selfreplicating stem and precursor cells as well as in systems that do. Like machines become damaged and eventually break down when utilized for a certain period of time, the wear andtear theory proposes that the human body also undergoes aging due to damage from accidents, diseases, radiation, toxic substances, food, and many other harmful substances when it is utilized for a long time. It is important to know the causes of aging, because as with treating any disease one must first understand the problem, so that afterward the precise remedy can be applied. Cefalu, md, ms keywords aging telomeres free radicals autoimmune theory of aging geneticdevelopmental theory of aging theories of aging several theories may explain the normal aging process, either alone or in combination with other theories table 1.

Organismal senescence involves an increase in death rates andor a decrease in fecundity with increasing age, at least in the latter part of an organisms life cycle. As just noted, its important to begin a discussion of the wear and tear theory of aging by recognizing that there are several distinct theories of aging of which the wear and tear theory is just one. The rate and progression of cellular aging can vary greatly from person to person. Explain skin tear st risk factors and assessment guidelines. According to the membrane theory of aging, agerelated decline in membrane. In agreement with this, the experimental elimination of senescent cells from transgenic progeroid mice 24 and nonprogeroid, naturallyaged mice 25 26 27 led to greater resistance. This section outlines some of the most widely accepted and major theories of the causes of aging. Modern biological theories of aging pubmed central pmc. Thought that aging was due to changes in body humors that began in early lifethese changes caused a slow increase in dryness and coldness of the body roger bacon c. Theorists agree that living organisms possess extensive maintenance and repair functions that act to repair damage.

We are approaching getting nearer to the death from the time of the birth onwards. The free radical theory of ageing as stated by harman proposes that free radicals derived from oxygen are responsible for damage associated with ageing. Here are the four principal theories of aging, each of which accounts for some aspects of the process. Psychology definition of wear andtear theory of aging. Wear and tear as we use our organs for various activities, some parts that will wear out faster than others and become damaged, thus putting more stress on the rest of. August weismann, a german biologist, in 1882, it sounds perfectly reasonable to many people even today, because this is what happens to most familiar things around them. Like components of an aging car, parts of the body eventually wear out from repeated use, killing them and then the body. To grow old or show signs of growing old websters new world dictionary, 2005. We are not sure about anything in the world except the aging. The wearandtear theory of aging implies that as individuals grow older, their exposure to damaging variables increase which causes their health to weaken. Wear and tear theory body cells, structures and functions wear out or are over used through exposure to internal and external stressors. Autoimmune reactions the primary organs of the immune system, the thymus and bone marrow, are affected by the aging process.

One or multiple theories may explain the aging process and characteristics as a wide range of factors that may affect aging such as genetics, random events, environment, lifestyle, and or habits. Identify best practice treatments for sts, including the appropriate dressings for each st type. On the other hand, the general idea of programmed theories of aging is that aging is. Wear and tear theories of aging senescence ageing scribd. Aging theory handout wear and tear theory of aging what it. The main theories attempting to explain the process of aging are generally thought to be the wear and tear theory, and the programmed theory, though they are not the only ones. Exposure to radiation, toxins and ultraviolet light. The general consensus for damagebased theories is that organisms accumulate detrimental toxins and damage at the molecular level throughout their lives, leading to the onset of aging. It is not concerned exclusively with debility, which looms so large in human. Aging theory handout wear and tear theory of aging what. The theory of aging is still wellaligned with what we know about the aging process, even with advancements made in recent years.

Indirect evidence for wearandtear theories of aging is provided by. Psychology definition of wear and tear theory of aging. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Similar to the wear and tear idea, this theory says you are born with a certain amount of energy. The wear and tear theory of aging, one of several theories, asserts that the effects of aging are caused by progressive damage to cells and body systems over time. Wear and tear can cause osteoarthritis when the cartilage that supports and cushions the joints of the hands, spine, hips, and knees wears away, causing bones to rub against each other. According to these theories, humans age for the same reasons and because of the same processes that cause aging in automobiles and exterior paint.

Accidental theories of aging rely on chancethe notion that organisms get older by a series of random events. While there is evidence for and against each of these theories, chances are that eventually, we will find that it is a combination of two or more of these. Biological theories of aging human growth and development introduction aging is a biological phenomenon all the living things are undergoing. Theories and mechanisms of aging office of geriatrics and. Resilience thinking allows older adults to accept the wear and tear of aging, while also dealing with problems and crises like losing a loved one, spousal caregiving, or acquiring a disability in ways that leave them feeling stronger than they would have been if they had not encountered those crises. Wear and tear theory the very general idea that changes associated with aging from bio 281 at the college at brockport. In biological terms, wear and tear would include, in addition to mechanical damage wear, other forms of molecular damage. Wear and tear theories of biological aging propose that aging in humans and other animals is simply the result of universal deteriorative processes that operate in any organized system. The free radical theory of ageing one of the most prominent theories to explain ageing is the free radical theory of ageing which was initially proposed by harman in the 1950s 7. Aging is controlled by genes mutations can accelerate or delay aging pathways that control aging are conserved across 1 billion years of evolution drugs that target these pathways may someday be used to treat diseases of aging and extend life. Indirect ev idence for wear and tear theories of aging is provided by individuals who. Wear and tear theory the very general idea that changes associated with aging. Yet millions struggle every day with health and safety challenges such as chronic disease, falls, and behavioral health issuesall of which can severely impact quality of life.

Sourcebook of family theory and research, and aging in east and west. Wear and tear theory the very general idea that school the college at brockport. Theories and mechanisms of aging ohio state university. As we use our organs for various activities, some parts that will wear out faster than others and become damaged, thus putting more stress on the rest of. Mark stibich, phd, fidsa, is a behavior change expert with experience helping individuals make lasting lifestyle improvements. The wear and tear theory of aging was first introduced by dr. The damage or error theory include 1 wear and tear theory. Aging is caused by environmental damage to our bodies systems, which accumulates over time genetic theory lifespan is determined by a biological clock. Figure 3 1 activity theory suggests that remaining involved and engaged is a needed ingredient to a satisfying late life.

Wear and tear is damage that naturally and inevitably occurs as a result of normal wear or aging. It is a process that goes on over the entire adult life span of any living thing. As a result, there now exist both programmed and nonprogrammed theories of aging based on maintenance and repair functions. Wear andtear theory body cells, structures and functions wear out or are over used through exposure to internal and external stressors. Once they wear out, they can no longer function correctly. Wear and tear is a form of depreciation which is assumed to occur even when an item. Aging takes place in a cell, an organ, or the total organism with the passage of time. It is used in a legal context for such areas as warranty contracts from manufacturers, which usually stipulate that damage from wear and tear will not be covered. Describe how inflammation links most of the chronic diseases of aging. The free radical theory of aging in search of a strategy for increasing life span. Describe how the bodys composition changes with age.

If the inline pdf is not rendering correctly, you can download the pdf file here. His research articles have appeared in the journals of. Pdf rethinking modern theories of ageing and their classification. One or multiple theories may explain the aging process and characteristics as a wide range of factors that may affect aging such as genetics, random events, environment, lifestyle, andor habits. Gerontology, the study of the aging process, is devoted to the understanding and control of all factors contributing to the finitude of individual life. Wt 104 isbn 978 92 4 069479 8 epub isbn 978 92 4 069480 4 daisy isbn 978 92 4 069481 1 pdf. Wear and tear theories of aging free download as word doc. Wear and tear theory the very general idea that changes. Another popular theory of aging that has gained momentum in the last 10. So the wear and tear theory of aging was first introduced by dr. Examples are dna damage from free radicals or just the wear and tear of daily life. Like machines become damaged and eventually break down when utilized for a certain period of time, the wear and tear theory proposes that the human body also undergoes aging due to damage from accidents, diseases, radiation, toxic substances, food, and many other harmful substances when it is utilized for a long time. These are several theories that try to explain the process of aging table 2.

Rethinking modern theories of ageing and their classification. Macronutrients and micronutrients obtained from food intake support biological and physiological activities required for optimal health. Wear and tear aging theories many people believe that aging is simply the result of deterioration caused by wear and tear, oxidation, other molecular damage, or other unavoidable natural process that causes gradual degradation. Theory that suggests cells and tissues have vital parts that wear out from repeated use and result in aging. Use, accidents, disease, radiation, toxins and other detrimental factors adversely affect different parts of the body in a stochastic fashion. Identify the major biological theories of aging including the wear and tear theory. The past decade has witnessed studies demonstrating a link between malnutrition and accelerated aging or agerelated disorders. Aug 01, 2010 so the wear and tear theory of aging was first introduced by dr. Is oa caused by wear and tear on joints or by other. Identify the major biological theories of aging including the wear and tear theory, autoimmune theory, cross linkage theory, free radical theory, antagonistic pleiotropy, and the microbiome perspective. It is very logical because it is what happens to the nonliving things that people observe around them i. Pdf for a very long time, ageing has been an insurmountable. Researchers are increasingly recognizing that social effects influence the evolution of aging.

Wearandtear theory like machines become damaged and eventually break down when utilized for a certain period of time, the wearandtear theory proposes that the human body also undergoes aging due to damage from accidents, diseases, radiation, toxic substances, food, and many other harmful substances when it is utilized for a long time. Free radicals highly reactive molecules generated from oxygen metabolism damage proteins, enzymes, and dna. Laidback people, who suffer from less stress and take life easier, would live longer should this theory prove correct. It is used in a legal context for such areas as warranty contracts from manufacturers, which usually stipulate that damage from wear and tear will not be covered wear and tear is a form of depreciation which is assumed to occur even when an item is used competently and with care and proper. This is a major and obvious difference between living organisms and nonliving entities and a main reason that the generic wear and tear theories do not work. Changes in physical function related to human aging.