PSYC 3404 Lecture Notes - Lecture 3: Sleep Deprivation, Hayflick Limit, Calorie Restriction
23 Nov 2017
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How to live longer: exercise, healthy eating: plant based diet, social support: stay connected to others. Life span: maximum years one can live (about 125 years max) Life expectancy: number of years that a person in a particular year will probably live (about. Vary by ethnicity: gaps between different race, might favor one more than another. Cellular clock theory: cells can divide 75 to 80 times (hayflick limit: once cells stop dividing, then you die: telomeres: cell division becomes shorter with each division run out= death. Free radical theory: cells metabolize energy and cause cell damage: linked to overeating and caloric restriction. Mitochondrial theory: producing energy free radicals impairs function of mitochondria. Hormonal stress theory: agi(cid:374)g i(cid:374) the (cid:271)ody"s hor(cid:373)o(cid:374)al syste(cid:373) (cid:272)a(cid:374) lo(cid:449)er resista(cid:374)(cid:272)e to stress increases disease rate. Sleep is a time to repair the body (neuronal, physiological, biological repair: repair and restoration theory: Allow body time to recover from exertions of the day.
