Bio 575 chapter 02 09

Bio 575 chapter 02 09 - life. Early infections likely have...

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Chapter 2 Robert Arking Biology of Aging, 3e Oxford University Press Wayne State University
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This is not an aging population
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a Survival Curve or l x curve
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a Death Curve or d x curve
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an Age-Specific Mortality Curve, or a q x curve
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This is an aging population
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an aging population has an increasing q x curve
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Complex inanimate objects fail. Survival & mortality curves are a property of complex objects, both living and non-living. There is no obvious difference between living systems & complex machines
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Lapwings in wild
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Sheep in zoo
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England 1962
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TEN LEADING CAUSES OF DEATH 1900, 1959 AND 1990 PERCENTAGE OF TOTAL
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1900 1915 1930 1945 Year L i fe length. Although the rise in life expectancy slowed in the United States around the middle of the 20th century (top), the decline in death rates has accelerated, at least for women (bottom). SCIENCE VOL. 280 17 APRIL 1998 www.sciencemag.org 398;396
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Mortality Rate Doubling Time =8-9 yrs
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Unformatted text preview: life. Early infections likely have unsuspected deleterious effects on somatic integrity which appears in late life. (“When Does Human Ageing Begin?, E. Milne, MAD 127:290, 2006) procaine control Mortality rates decrease as the individuals get older! Counter-intuitive but true. The relationship between age-independent mortality rates and the type of survival curve observed for a given population is shown below. If the age-dependent mortality (line 1) is assumed to be fixed, then it is the environment-dependent mortality (lines 2-8) which dictates the shape of the survival curve. Figure 18.27 Rapid growth Kenya Male Female Percentage of population Primary reproductive ages Slow growth United States Female Percentage of population Zero growth/decrease Italy Male Female Percentage of population Male The uncoupling of sex from reproduction plus the increased survival of children brings about this Demographic Transition...
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This note was uploaded on 08/05/2010 for the course BIO 5750 taught by Professor Arking during the Winter '09 term at Wayne State University.

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Bio 575 chapter 02 09 - life. Early infections likely have...

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