Aging And Aging

Aging Aging is the process of growing older. It’s defined in Evolutionary Medicine “as a decrease with age in the intrinsic ability to survive and reproduce” (Stearns, 64). Aging can be influenced by natural selection. Natural selection is the mechanism by which an organism that is best suited to its environment will survive and pass on its beneficial traits in increasing numbers to the generations. For example, some animals are capable of catching their own prey while others cannot. If an animal advances a trait that helps it to survive, it will pass on the trait to its young, resulting in the widespread presence of that trait in the population. Intrinsic and extrinsic helps to understand and measure aging. Intrinsic is a result of aging.

When extrinsic mortality rates increase, they lower the probability of survival and cause the strength of selection to decline faster with age which increase in intrinsic morality rates with age. Age is defined as the length of time that a person has lived or a thing has existed. To age well is to maintain your physical and mental health as you grow older. Age is marked by certain stages, aging well can be considered the freedom from disease and an active engagement with life. Some lifestyle choices with respect to aging well can be exercising and dieting. Growing old does affect our hair, skin, heart, muscles and more but aging well is possible if we incorporate a healthy lifestyle. There are two mechanisms that mediate aging. They are proton leakage, and telomere damage. The proton leakage is when the growth rate and metabolic rate cause energy flow to increase. When these genes mediate energy metabolism could cause aging. The telomere is a protective cap at the end of chromosomes that are shorten with each cell division. When they deteriorate away the next cell divisions unsuccessfully duplicate the

When woman stop ovulating and menstruating there is a loss of fertility. There are at least four hypothesis for the evolution of menopause. They are the mother, the grandmother, the by-product, and the self- domestication. The mother hypothesis stop reproducing because the risk of dying in childbirth increases with age. Grandmother hypothesis claims the grandmother can help their daughter rear their grandchildren. The by-product claims that menopause evolved by a quality control of oocytes and the self –domestication claims that post reproductive life resulted from improvements in survival caused by social behavior and agricultural