Ch. 14: Physical, Cognitive, and Mental Health Issues of Later Life Flashcards
Average Longevity
Age at which half of the people born in a particular year will have died
Maximum Longevity (Life Expectancy)
Oldest age to which a person lives
Active Life Expectancy
Number of years that a person is free from debilitating chronic disease and impairment
Dependent Life Expectancy
Number of years a person lives with a debilitating chronic disease in which the person depends on others for care
3 Biological Theories of Aging
Metabolic: related to how much energy one can expend
Cellular: cells have a fixed number of times they can divide before dying or free radicals producing highly reactive chemicals causes issues
Genetic Programming Theories: Genetic code-based aging
Telomeres
Tips of chromosomes play a major role in aging by adjusting the cell’s response to stress and growth stimulation based on cell divisions and DNA damage, and by typically shortening with each cell replication
Telomerase
Enzyme needed in DNA replication to fully reproduce the telomeres when cells divide
Free Radicals
Highly reactive chemicals produced randomly in normal metabolism
Neurofibrillary Tangles
Spiral-shaped masses formed when fibers that compose the axon become twisted together (axon transmits information inside neuron). Some tangling is normal but large degree is associated with Alzheimer’s and dementia
Beta-amyloid
A protein that is the basis for neuritic plaques and is thought to be the basis for dementia
Neurotransmitters
chemicals released by neurons in order for them to communicate with each other
Structural Neuroimaging
techniques such as CT or MRI scans that provides highly detailed images of anatomical features in the brain
Functional Neuroimaging
technique that provides an indication of brain activity but not high anatomical detail
Atherosclerosis
Disease caused by calcification and blockages in the arteries
Strokes or Cerebral Vascular Accidents (CVAs)
Interruption of the blood flow in the brain dues to blockage or hemorrhage in a cerebral artery