Human Growth and Development / Unit 15 HGD 2107 short lesson, about 20 seconds
Wear and Tear and Genetic Theories
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The idea
Wear and tear theory, that accumulated damage causes aging, is weakly supported, since the body repairs damage and active people live longer.
In practice
The longevity of close blood relatives, but not spouses or in-laws, predicting one's own.
Where people slip
Gene variants such as APOE are associated with longevity, supporting a role for genetic variability.
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