Chapter 17: Physical Development in Late Adulthood Flashcards
Life span
The max number of years an individual can live (120-125)
Life expectancy
The number of years that will probably be lived by the avg person
Latino Health Paradox
Despite having lower educational attainment and income levels, latinos have a higher life expectancy than other groups in the USA
Why can women expect to live longer than men?
Men are more likely to die from leading causes of death than women and have more unhealthy behaviors
Women (and females of virtually every species) are more resistant to infection and degenerative diseases
What are the leading causes of death?
Respiratory cancer, motor accidents, cirrhosis of the liver, emphysema
Among various groups, the longest average longevity in the US belongs to the _______.
7th Day Adventists (88 yrs)
Centenarians
People 100+ years old
The number of centenarians is increasing by __% each year.
7
Supercentenarians
People 110+
Compression of morbidity
Centenarians experience chronic high-mortality diseases much later than most people
What factors are associated with living to be 100?
- Compression of morbidity
- longevity genes
- ability to cope with stress
- no smoking habits
- no obesity
Where do people live the longest?
Okinawa, Japan
When is late adulthood?
60-125
Young-old vs oldest-old
y-o: 60-85
o-o: 85+
Evolutionary theory of aging
Natural selection has not eliminated many harmful conditions and nonadaptive characteristics in older adults; thus, the benefits conferred by evolution decline with age because natural selection is linked to reproductive fitness
Cellular clock theory
Leonard Hayflick’s theory that the max number of times that human cells can divide is about 75 to 80; so, as we age, our cells have less capacity to divide
Telomerase
Enzyme found in cancerous cells, can extend the life of cells
Telomeres
Long telomeres are associated with longer life
Free-radical theory
People age because when cells metabolize energy, unstable oxygen molecules (free radicals) are produced and ricochet around cells, causing damage
Mitochondrial theory
Aging is caused by decay of mitochondria
Sirtuins
Family of proteins that have been proposed to have important influences on longevity, mitochondria functioning in energy, stress resistance, calorie restriction benefits, and cardiovascular functioning
mTOR pathway
Cellular pathway involving the regulation of growth & metabolism that has been proposed as a key aspect of longevity