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Social Gerontology3

Multidisciplinary perspective of chapter 3

Biological aging physical changes that reduce the efficiency of organ systems due to decline in number of cell replications AND loss of certain types of cells that do not replicate
Criteria for Biological aging theories 1. process must be universal (all species must experience phenomenon) 2.process must be deleterious(harmful) or physiological decline 3.process must be progressive (losses must be gradual over time) 4.Losses must be intrinsic (cannot be corrected)
Wear and tear theory organism simply wears out.- preprogrammed process- each species has a biological clock)
Autoimmune system immune system becomes defective over time and produces antibodies against itself--- older people become more susceptive to infections
Cross-linking Changes in collagen-important connective tissue found in most organ systems (1/3 of body is collagen)
what happens to normal eye fluid fills two chambers in eye. aquaeous humour (front portion of eye) vitreous humour (behind lens)
glaucoma eye drainage is less efficient or an excess production of the aquaeous humour occurs and caused pressure on the optic nerve
cataracts lens becomes opaque and less light passes through (looks cloudy) lack of A,C, E vitamins
Macular degeneration lose acuity in center of vision. Macula is part of retina with best visual activity.
Presbycusis age-related hearing loss
tinnitus high pitched ringing in ears
Created by: KSiobhan