Theories of Aging Flashcards
What is the mutation accumulation evolutionary theory?
Aging viewed as non-adaptive trait in which late acting genes accumulate.
What is antagonistic pleiotropy?
A single gene controls or influences multiple traits
Genes that effect early fitness are harmful in later years.
What is the Activity psycosocial theory?
Maitenance of and alterations in regular activites.
What is the life course theory?
Progressive adjustment to changes with increase age.
What is the psycosocial Continuity theory?
Use familiar strategies as adaptive way to deal with changes.
What is the telemere theory?
Cellular replicative senescense is triggered when cells acquire critically short telomeres.
What is the error catastrophe theory?
Damage to RNA and proteins that read the genes leading to aging!
Increased # of mistakes.
What is the rate of living theory?
Aging is caused by the rate of metabolism, the aerobic metabolism causes oxygen free radicals.
What is the endocrine theory?
Hormone levels change with aging, some circadian cycles become irregular such as:
Growth hormone
Sex steroid hormones
What is the stem cell theory?
Stem cell precursor cells become depleted by phenotypic drift, injury, illness, environmental challenges etc.
