PSYC228_Chap15 Flashcards
all people recognize signs of aging by
age 60
senescence
physical signs of aging
most rapid at end of lifespan
most commom statistic to compare health of older adults in various countries
average life expectancy at birth
life expctancy for aboriginal canadians is
5 yrs lower than other canadians
lifespan
highest boundary or limit of a particular sp
guinness world records - 122
gerontology
area of social science that studies the physical, cognitive, + socio-emotional issues in later adulthood
likely to cont to expand
in 1931, less than 60% of males and 62% of females survived to age
65
in 2001, 84% of males + more. than 90% of females lived to
65
during next 40 yrs, people over 65 expected to
more than double in US
clarke thinks that steady inc in life expectancy due to
improved nutrition
better hygiene,
access to safe drinking water
effective birth control
immunization
other medical interventions
on average, how many yrs can canadians expect to spend in good health
70-80 yrs
centenarian
someone hwo is at least 100 yrs old
growing group
global life expectancy has inc from 64 to
70 in 2011
a lot due to dec in child mortality + health improvements in china + india
but life expectancy has dec in coutnries with limited resources
three groups of elderly
young-old
old-old
oldest-old
young-old
traditionally healthy, actice, independent, betw 60-75
adults in thier later yrs betw 60-75, who are still healthy active + independent
old-old
adults in their layer yrs, traditionally betw ages 75-85, who are beginning to deal iwth dec health
beginning to deal with loss of spouses + health
oldest-old
adults in their later yrs, traditionally, over 85, who are at risk for illness + injury + often dependent on others for assistance with daily living activities
often living in some type of assisted facility
senescence is may be multidirectional
some systems dec while others improve funciton
contracting muscles dec faster than
lengthening muscles
program theory of aging
theory that aging occurs bec of some predetermined internal or external chemical process built into cells that cause deterioration over time
error theory of aging
theory that aging occurs bec of environmental forces such as disease that affect the function of cells, causing deterioration
hayflick’s limit
number of times a cell can divide during the lifespan based on a predetermined number of cell divisions
internal clock with finite limit of times of divisions
biological clocks
fountain of youth enzyme?
telomerase
in cancer cells
replaces loss of telomere which usually signals division stop
hoping to get it to target normal cells
theory of programmed cell is death is a
evolutionary theory
based on assumption that nat selection influences biological processes, resulting in destruction of organisms that don’t reproduce
apoptosis
programmed cell death + self destruct
occurs with greater freq as we age
error theories of aging
based on assupmtion that aging is affected by outside forces
no internal clock
suggest that aging is caused by factors that affect normal cell processes - free radicals, disease, genetic mutation
leading cause of death from birth to middle adulthood
unintentional injury + accidents