Biology

In 1997, oldest person was 133 in France. In 2001, it was 122. 1776: squiffy length of service was 35 historic period 1976: Mean longevity grew to 72 years 2001: Mean longevity in some nations, like Japan, has reached 80 years, hardly no the United States. METHODS OF STUDYING AGING IN mankind POPULATIONS Horizontal: takes a group of raft with something in green Longitudinal: takes a group of people and studies them everywhere a longer period of time. Many people reserve the group. Framingham break down: begun in 1948 in Massachusetts with 5209 people ages 30-59, men & vitamin A; women, added 5135 children of original subjects. THEORIES OF WHY WE AGE 1. PROGRAMMED cadre DEATH: genetic, inherited, perchance at that place are gerontogenes that program aging. If there are gerontogenes, maybe variations in these genes cause aging to vitiate the farm at diverse rates. APOPTOSIS: programmed cell destruction HAYFLICKS NUMBER: said that cells kind integrity a mortal num ber of times, and then they die. They divided or so 50 times. He was dealing with cells in tissue acculturation in a glass bottle. In a biologic sense, intimate REPRODUCTION involves exchange of genetic substantial amidst 2 antithetic individuals. MUTATION: a change in the genetic material METABOLISM: all(prenominal) chemical reactions that occur in a living cell/organism 2. neuro internal secretion guess: endocrine system regulates by the secretion of hormones, and the unquiet system relates galvanising currents. They are our regulatory systems and so advert on aging. 3. snap & TEAR surmisal: as you use your consistency it begins to wear-out, and so it ages. 4. SOMATIC MUTATION THEORY: (Somatic cells are all cells in the body except for spring up procreative cells (having 46 chromosomes)). This theory supposes a change or mutation in our DNA. 5. DNA REPAIR THEORY: recognizes a change in the DNA, and so it readys itself. As people age, it does not repair itself as effectively. 6. WASTE PRODUCT ACCUMULATION ! THEORY: yen products accumulate in cells until it... If you want to get a right essay, order it on our website: OrderEssay.net

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