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Years of life: 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85
How many times have we heard someone strong hold for years and that his passage of time does not seem to be anything. No matter how good life had, and no matter how good health was, at one point we will begin to age. In fact, some believe that the process of biological aging starts already by birth. Although every day we discover new secrets about ourselves and the world around us, still reliably do not know why we age. Interesting answers to this question gives us four biological theories: the theory of cellular clock, the theory of free radicals, mitochondrial theory of hormonal stress.
According to the theory of cellular clock human cells can not divide a maximum of 75 to 80 times during our life and as we age they become personal finance software less able to share. Based on the way in which cells divide, it is concluded that the upper limit of human longevity has been between 120 and 125 years. Under this theory, the length of human life has not changed in ing ten thousand years since the creation of homo sapiens. What you eat has changed the expected future lifetime: average number of years of future life of a person born in a particular year. The disadvantage of this theory personal finance software was that it did not give an answer personal finance software to the question of why cells die. It is now thought that the answer might lie in telomeres, the protective structures at the tips of kromosona, which shorten with each cell division. After 70 to 80 division, telomere length was dramatically reduced and the cell can no longer divide.
The theory of free radical theory of aging is microbial, which argues that people age because when cells metabolize energy appear to be by-products that include unstable molecules oxygen-free radicals. Free radicals bounce inside cells by damaging DNA and other cell structures. Such damage ultimately lead to cell death or disorders such as malignant diseases or inflammatory processes. Abundant food consumption is associated with an increase in free radicals but the latest research has shown that restricting caloric intake reduces oxidative cell damage causing free radicals.
In recent personal finance software times, a growing personal finance software interest in exploring a possible role of mitochondria in the aging process. Mitochondria has tiny corpuscle located in the cell and serves personal finance software as a source of energy needed for its functioning, growth and repair. personal finance software According to the mitochondrial theory, aging is the result of decomposition of mitochondria. Why would they decompose? Among the by-products of energy production are free radicals which were previously discussed. According to the mitochondrial theory, personal finance software the damage produced by free radicals initiates We destroying cycle that results personal finance software in the creation of an increasing number of free radicals. Over time, damaged mitochondria become less able to meet the energy needs of the cell. It was found that mitochondrial damage associated with cardiovascular diseases and neurodegenerative diseases such as dementia, for example. However, it is not known exactly whether this mitochondrial damage caused by aging or is it just a side effect of the aging process.
Previous theories about the causes of aging try to explain personal finance software aging at the cellular personal finance software level. The theory of stress hormone that resonates aging hormonal systems in the body can cause a reduction of stress and increase the probability of morbidity. Normally, when people are under the influence of stressors, their body responds by releasing certain hormones. In the elderly hormones that are secreted under the influence of stress remain at elevated levels for longer than younger patients. Such a condition risen hormone levels, which is held for a long time is responsible for the increased risk of cardiovascular disease, cancer, diabetes and high blood pressure.