PSYCH-200 Lecture Notes - Lecture 14: Telomere, Dna Replication, Telomerase
Document Summary
The average age of americans will continue to rise. By 2040, china expects to have over 300 million people over age 60. In 1950 and 2014, there are substantially fewer older adults than younger adults in developing countries. By 2050, number of older adults in developing countries will have increased dramatically. Longevity vs. average life expectancy vs. useful life expectancy. Longevity number of years an individual can expect to live. Maximum life expectancy oldest age to which any individual lives. Programmed theories theories that aging is biologically or genetically programmed. Wear-and-tear theory the body, much like any machine, gradually deteriorates and finally wears out. Cellular theories explanations of aging, focusing on harmful substances or the deterioration of cells over a lifetime. Telomeres tips of chromosomes that play a major role in aging by adjusting the cell"s response to stress and growth stimulation based on cell divisions and dna damage.
