FRHD 1010 Chapter 12: FRHD1010-Chapter 12
16 Aug 2016
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Document Summary
Adult senescence: a gradual physical decline related to aging, occurs in everyone and in every body part but the rate of decline is highly variable within and between persons, mainly goes unacknowledged until late in adulthood. Organ reserve is the extra capacity built into each organ, such as heart and lungs, that allows a person to cope with extraordinary demands or to withstand organ strain. Homeostasis is the adjustment of all the body"s systems to keep physiological functions in a state of equilibrium, moment by moment. As the body ages, it takes long for these homeostasis adjustments to occur, so it becomes harder for older bodies to adapt to stress. Allostasis is a dynamic body adjustment, related to homeostasis, that over time affects overall physiology. Main different is that while homeostasis requires an immediate response, allostasis requires longer-term adjustment: eating becomes more related to emotional satisfaction, this requires adjustment over decades.
