Final Exam Flashcards
Demographers
people who study population trends
Longevity
the number of years a person can expect to live
Average Life Expectancy
the age at which half of the people born in a particular year will die in the united states
Useful life expectancy
the number of years a person lives without a debilitating chronic disease in which the person depends on others for care
Maximum life expectancy
the oldest age to which any person lives
Programmed Theories
suggest that aging is programmed into genetic code via programmed cell death
Wear-and-tear theory
suggests that the body gradually deteriorates over time due to accumulated damage from daily activities, environmental stressors, and biological processes
Cellular theories
point to aging at the cellular level (number of cell divisions)
Free radicals
highly reactive chemicals produced randomly in normal metabolism
Neurofibrillary tangles
spiral-shaped masses in the brain that are formed when fibers of the axon become twisted together, which interfere with the neuron’s ability to transmit information down the axon
Neuritic plaques
damaged or defective neurons that form around a core of protein
Stroke, or cerebral vascular accident (CVA)
interruption of the blood flow in the brain due to blockage or a hemorrhage in a cerebral artery
Transient ischemic attack (TIA)
the brief interruption of blood flow to the brain; often an early warning sign of stroke
Vascular Dementia
a disease caused by numerous small cerebral vascular accidents
Cataracts
opaque spots on the lens that limit the amount of light transmitted
Psychomotor speed or reaction time
Working memory
the processes and structures involved in holding and using information in problem solving, decision making, and learning
Implicit memory
is unconscious and automatic memory about previously learned information, as seen in one’s behavior or reactions
Explicit memory
conscious and deliberate memory for previously learned information
Episodic memory
recalling information about the world tied to a specific time or event (this includes autobiographical memory, memory for events that occur during one’s life)
Semantic memory
remembering the meaning of words and concepts
External aids
memory aids that rely on environmental resources, such as notebooks and calendars
Internal aids
memory aids that rely on mental processes, such as imagery
Dysphoria
feeling sad or down