ADULTCh3-1[1] - Adulthood and Aging, 6e John C. Cavanaugh...

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CHAPTER THREE CHAPTER THREE Physical Changes Physical Changes 1 of 40 Adulthood and Aging, 6e John C. Cavanaugh Fredda Blanchard-Fields
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Why Do We Age? Biological Theories of Aging Learning Objectives How do rate-of-living theories explain aging? What are the major hypotheses in cellular theories of aging? How do programmed cell death theories propose that we age? How do the basic developmental forces interact in biological and physiological aging? 2 of 40
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Why Do We Age? Theories Rate-of-Living Theories Limited energy to expend in lifetime Less calories predict longer lives 3 of 40
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Why Do We Age? Theories Cellular Theories Limited number of times a cell can divide (Hayflick limit) Exercise may slow rate Cross-linking Tissue becomes stiffer with age Free radicals Reactive chemicals causing cellular damage Antioxidants prevent (Vitamin A, C, E, etc.) Evidence postpones cancer, cardio disease and immune system 4 of 40
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Why Do We Age? Theories Programmed Cell Death Theories Aging programmed into genetic code? Cells pre-programmed to self-destruct? How does this work? Evidence for other genetic pathologies: Osteoarthritis Changes in the brain cells Alzheimer’s Memory loss Personality changes 5 of 40
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Why Do We Age? Theories Implications of the Developmental Forces The biological, psychological, sociocultural, and lifecycle forces Unified theory not yet developed Three general approaches to slowing or reversing the aging process: 1. Delay the chronic illnesses of old age 2. Slow the fundamental processes of aging to increase life span 3. Arrest or reverse aging by removing the damage caused by the metabolic process 6 of 40
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Appearance and Mobility Learning Objectives How do our skin, hair, and voices change with age? What happens to our body build with age? What age-related changes occur in our ability to move around? 7 of 40
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Changes in Skin, Hair, and Voice Changes in Skin Why does our skin wrinkle? Four-step process Effects of sun exposure on skin How to counteract these effects Other skin changes Pigment-containing cells decrease Age spots, moles Varicose veins 8 of 40 Appearance and Mobility
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Changes in the Hair Individual differences
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ADULTCh3-1[1] - Adulthood and Aging, 6e John C. Cavanaugh...

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