PSY 3128 Lecture Notes - Lecture 2: Programmed Cell Death, Elastin, Telomere
29 May 2016
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Rate of living theory: people have only so much energy to expend in a lifetime (metabolic, caloric, stress adaptation) Programmed cell death theory: even when cell death appears random, researchers now believe that such losses may be part of a master genetic program. Sun and normative age-related processes makes older adults skin thinner and drier (leathery texture) Changes in hair: hair loss caused by destruction of the germ centers that produce the hair foolicles, whereas greying results froma cessation of pigment production, Changes mobility: muscles: loss is hardly noticeable in terms of strength and endurance; even at age 70 loss is no more than 20, bones: Women lose twice as fast as men (less bone mass in ya and depletion of estrogen after menopause speeds up bone loss) Osteoporosis: loss of bone mass and increased porosity creates bones that resemble laced honeycombs. High risk in fair-skinned, thin, and small framed women of european descent than in other groups: joints:
