Examlex
____ is the criterion used by the elderly to define themselves as old.
Homeostasis
The biological process by which living organisms maintain a stable internal environment despite changes in the external environment.
Senescence
The biological process of aging, characterized by the gradual decline in physiological functions and increased vulnerability to diseases.
Wear-And-Tear Theory
A concept in biology and gerontology that suggests the aging process is the result of accumulated damage and degradation of cells and tissues over time.
Autoimmune Theory
A hypothesis in medical science suggesting that some diseases are caused by the immune system mistakenly attacking the body's own tissues.
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