HDE 100C Lecture Notes - Lecture 2: Eardrum, Reduced Properties, Macular Degeneration
8 Oct 2016
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Theories of primary aging: caloric restriction, primary and secondary aging. Primary aging a gradual process that is inevitable, happening to most people; typical aging . Increases survival rate (need caretakers for the young) Grandmother effect": maximum life span longest time a member of a species can live under ideal conditions, theories of primary aging. Two types of theories: random or stochastic theories. Random or stochastic theories: based on evidence of random damage that takes place at the cellular level. Senescence (aging process) is caused by random/unplanned damage to our dna: random or stochastic theories examples, oxidative change/damage: we aren"t as efficient in our ability to repair damage; aging is the result. Free radicals molecules with an unpaired election: result of: regular body metabolism; diet; x-rays; air pollution, waste product accumulation theory: Lipofuscin (a brown pigment product from breaking down damaged blood cells) and other waste products accumulate in the cell: lysosomes (organelles that take up and degrade waste.
