Download Aging and Human Longevity by M.-F. Schulz-Aellen PDF

By M.-F. Schulz-Aellen

The share of aged humans maintains to extend within the western world-nearly 1 / 4 of the inhabitants could be over sixty five years by means of the 12 months 2050. seeing that getting older is observed via a rise in ailments and by means of a deterioration in health and wellbeing, discovering suggestions to those social, scientific and mental difficulties is inevitably a massive aim for society. Scientists and clinical practitioners are for that reason confronted with the pressing activity of accelerating uncomplicated wisdom of the organic tactics that reason getting older. extra assets needs to be positioned into this study so that it will in attaining higher figuring out of the mobile mechanisms that underlie the diversities in lifestyles span among species and to respond to the tough questions of why a few participants age extra quick than others, and why a few strengthen liver difficulties, a few have cardiovascular disease, and others mind difficulties. the result of the sort of vast software of analysis will offer vital information regarding the explanations of many life-threatening and/ or debilitating ailments of previous age; it's going to aid locate how one can hinder many of the diseases that end result from getting older, and it could result in discoveries allowing the prolongation of human life.

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Brecher (1984) analyzed the sexual be- Factors That Influence Human Longevity 31 haviors of 4200 individuals ranging from 50 to 93 years. A very high percentage of men and women (65-98%) in this age group were sexually active; active includes sexual intercourse and/or masturbation. In his early seventies, Brecher wrote: "Having successfully pretended for decades that we are nonsexual, my generation is now having second thoughts. We are increasingly realizing that denying our sexuality means denying an essential aspect of our common humanity.

The negative effects of stress on the efficiency of the immune system, in particular on the activity of natural killer cells (Rodin, 1986; Levy et aI, 1987), are well described. Cancer might then occur as a consequence of a deficient immune system, secondary to stress. The Biology of the Stress Response Steroid hormones are implicated (together with other endocrine or neurotransmitter systems) in the adaptive and pathogenic aspects of the stress response. One of these hormones, cortisol, a glucocorticoid hormone synthesized from cholesterol, is secreted by the adrenal glands into the bloodstream in response to a variety of stressors.

Macieira-Coelho (1995) proposed Variability of Life Span Between Species 23 that postmitotic cells, having reached their terminal differentiation process, might playa role in pathological conditions associated with aging; the presence of an excess of these cells might disturb tissue homeostasis and lead to pathological states (see Chapter 3, pages 72-74). Are Some Plants or Animal Species Immortal? " Bacteria never have the opportunity to age because they divide before aging processes produce measurable changes.

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