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Canada (162,364)
Psychology (2,981)
PSY313H1 (12)
Chapter 2

psy aging- Chapter 2.doc

3 Pages
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Department
Psychology
Course Code
PSY313H1
Professor
Gillian Rowe

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Psychology 313- Chapter 2 – Physical changes Rate of living theories Celluar theories  Hayflick organism: cells grown in laboratory c culture dishes undergo only a fixed number of division before dying, with the number of possible divisions dropping depending on the age of the donor  human adult is only capable of 20  1 .Telomeres: tips of the chromosomes play a major role  2. Cross- linking: in which certain proteins in human cells interact randomly and produce molecules that are linked in such a way as to make the body stiffer - the protein is Collagen – body issue that reinforcing rods Theories of Programmed cell death  cell death appears to be a function of physiological process, the innate ability of cell to self- destruct and the ability of dying cells to trigger key processes in other cells  right now we do not know how it works  but it may be the key to understanding how gene and physiological process interact with psychological and sociocultural forces to produce aging Implication of the development  we do not have an unified theory of biological an physiological aging yet Appearance and mobility  positive feelings about signs of aging are related to positive self- esteem Changes in the skin Why does our skin wrinkle? 1. the outer layer of skin becomes thinner through cell loss, causing the skin to become more fragile 2. the collagen fibres that make up the connective tissue lose much of their flexibility, making the skin less able to reign its shape after a pinch 3. slastin fibres in the middle layer of skin lose their ability to keep the skin stretched out, resulting in sagging 4. they underlying of fate which helps provide padding to smooth out the contour diminishes you can prevent wrinkles – less exposure to ultraviolet rays from the sun by using sunblock  lifetime of sun and normative age related processes make older adults skin thinner and more vulnerable to cuts, bruises and blisters  people should use facial massages, vitamin E and skin moisturizers  age spot and moles  blood vessels – irregular red lines Changes in hair  grey hair Change in voice  you can tell by the person's age by their voice  older adults have thinner and weaker  age related changes, lower in one's voice Changes in body build 1. decrease in height until reach 50 - men loses 25 milimeters (1 inch) and women loses 50 -compression of the spine from loss of bone strength , changes in the discs between the vertebrae in the spine and changes in posture 2. fluctuation in weight - weight gain in the middle and loss later - gain between their 20s and their mid 50s and lose weight when they are older - change in metabolism - men have gain around the abdomen middle aged bulge
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