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Gero Exam 1 Ch 1-4 Eliopoulos Questions and Answers
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Gero Exam 1 Ch 1-4 Eliopoulos Questions and Answers
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Gero Exam 1: Ch 1-4 EliopoulosQuestions and Answers
Cross-Linking Theory of Aging - Answers -Proposes that cellular division is threatened
as a result of radiation or a chemical reaction in which a cross-linking agent attaches
itself to a DNA strand and prevents normal parting of the strands during mitosis.
Free Radicals & Lipofuscin Theories - Answers -Suggests that aging is due to oxidative
metabolism and the effects of free radicals. This creates a product of oxidation that can
only be seen under a fluorescent microscope. Accumulation of this pigment interferes
with diffusion and transport of essential metabolites and information-bearing molecules
in the cells.
Wear & Tear Theories - Answers -Attribute aging to the repeated use and injury of the
body over time as it performs its highly specialized functions.
Evolutionary Theories - Answers -Hypothesize that the differences in the aging process
and longevity of various species occur due to interplay between the processes of
mutation and natural selection.
Apoptosis - Answers -Programmed cell death that is part of the normal development
process that continues throughout life.
Genetic Theories - Answers -Genetic mutations predetermine aging process.
Autoimmune Reactions - Answers -Changes in immune function with aging.
Neuroendocrine & Neurochemical Theories - Answers -Changes in the brain and
endocrine glands that promote aging.
Radiation Theories - Answers -Radiation may induce cellular mutations that promote
aging (i.e., sun exposure-->cancer)
Nutrition Theories - Answers -Deficiencies of vitamins and nutrients as well as obesity
promote the aging process.
Environmental Theories - Answers -Things in our environment such as smoking, lead
exposure, ingestion of mercury, pesticides, crowded living conditions, and high noise
levels influence how we age.
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