Theories of aging jump to:navigation, search goldsmith's review of modern programmed (adaptive) theories of biological ageing investigates how organisms have evolved mechanisms that purposely limit their lifespans in order to obtain an evolutionary benefit. Biological theories of aging psychology of aging october 20, 2005 biological aging defined aging is a complex biological process in which changes at molecular, cellular, and organ levels result in a progressive, inevitable, and inescapable decrease in the body's ability to respond appropriately. 5the membrane theory of aging the membrane theory of aging was first described by professor imre zs-nagy of debrechen university, hungary according to this theory it is the age-related changes of the cells ability to transfer chemicals, heat and electrical processes that impair it.
Biological theories of aging stop the biological clock october 23, 2016 dr jeeri r reddy sr phd the president director research & development charles rivers. Aging theories and medical research programmed and non-programmed theories of aging lead to very different concepts regarding biological mechanisms of aging, which in turn lead to very different approaches in attempting to prevent and treat age-related diseases.
The programmed theories imply that aging follows a biological timetable, perhaps a continuation of the one that regulates childhood growth and development this regulation would depend on changes in gene expression that affect the systems responsible for maintenance, repair and defense responses.
Curve 1: modern non-programmed aging theories – the evolutionary value of further life and reproduction is effectively zero beyond some species-specific age curve 2: modern programmed aging theories – there is an evolutionary cost associated with surviving beyond a species-specific age. Aging: aging, progressive physiological changes in an organism that lead to senescence, or a decline of biological functions and of the organism’s ability to adapt to metabolic stress aging takes place in a cell, an organ, or the total organism with the passage of time. Cellular aging theory aging occurs as cells slow their number of replications (hayflick, 1961) cells are programmed to follow a biological clock and stop replicating after a given number of times.
Senescence (/ s ɪ ˈ n ɛ s ə n s /) or biological ageing is the gradual deterioration of function characteristic of most complex lifeforms, arguably found in all biological kingdoms, that on the level of the organism increases mortality after maturation. Psychosociological theory in addition to theories of aging based on molecules and cells, there also exists a “psychosociological” theory of aging as people grow older, their behaviour changes, their social interactions change, and the activities in which they engage change.