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Theories of aging can be divided into two categories: those that answer the question “Why do we age?” and those that address the. question “How do we age?” Only a few broad, overarching theories attempt to explain why we and nearly all living organisms age.
1 Νοε 2015 · Some mechanisms likely contribute to different degrees in different individuals. While aging theories remain unproven, the public and marketers embrace some such as the free radical theory of aging (FRTA), and use it as a basis to promote antiaging products aimed at neutralizing free radicals.
Three major psychosocial theories have been proposed to attempt to explain successful aging. These include the activity theory, disengagement theory and the continuity theory.
The free radical theory of aging, first proposed by Denham Harman (36), holds that damage caused by oxygen radicals is responsible for many of the bodily changes that accompany aging.
1 Αυγ 2002 · The biological theories of aging analyze the degeneration process of the structure and function of cells and organic systems. They can be generally classified into two categories:...
Several theories may explain the normal aging process, either alone or in combination with other theories (Table 1). These theories can be generally classified into evolutionary, involving historical and evolutionary aspects of aging, and physiologic or structural and functional changes.
1 Νοε 2015 · Here, we review known biological theories of aging and how ROS mechanistically control senescence and the aging process. We also describe the redox-regulated signaling networks controlling the SASP and its important role in driving age-related diseases.
