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8 Cards in this Set
- Front
- Back
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Wear & Tear Theory
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Body is like a machine on warranty, parts can be replaced to last longer, but eventually it will wear out.
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Cross-linkage theory
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damage occurs to one strand of DNA, b/c of age defense is weakened & damaged DNA is reproduced until irreparable damage occurs
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Free Radical Theory
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highly unstable & reactive molecules that damage other cells, when you age the defense & repair mechanisms stop working
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Immunity Theories
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immune system weakens due to age, old ppl more susceptible to diseases
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Genetic Theories (Program theory of aging)
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preset life expectancy, cells are able to divide 50 times then they just deteriorate
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Apoptosis
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non-inflammatory, gene driven, normal developmental process through life. cell shrinkage & maintains membrane. helps balance cells that should be kept & cells that should be eliminated.
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Caloric Restriction Theories
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in animals, decreasing diet 30-40% increases lifespan, ability to protect cells & handle stress better
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Activity Theory
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older ppl remain socially & physiologically fit if they are actively engaged in activies
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