Biological Aging and Health

4 important questions on Biological Aging and Health

Rate of living theory/ wear and tear theory

We begin life with a fixed amount of physiological energy. If we expent it quickly, aging begins early and proceeds rapidly. However, we can retard aging by conserving energy > little evidence for this theory.

Stress theory of aging

The biological system sustains damage from prolonged exposure to stress. Ultimately, stress-related damage to the biological system can accelerate the aging process.

Scaffolding theory of aging and cognition (STAC)

Figure 3.6 Accounts for the possibility of both deficient and preserved performance on cognitive tasks. The model acknowledges that the aging brain must adapt to neural challenges including atrophy. To cope with such challenges, the brain must builds alternative neural circuitry, or scaffolds. These scaffolds, which represent compensatory strategies that are designed to offset age-related decline in functioning, may not be as efficient as the more focused circuitry of young adult brains.
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Instrumental activites of daily living

A term that refers to the more complex activities required for carrying out the bussiness of daily life, including preparing meals, shopping, managing money, doing housework, using the telephone, and taking medications.

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