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Chapter Chapter 17

NU FS356 Chapter Chapter 17: Physiological Changes of Aging

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University of Alberta
Nutrition and Food Sciences
NU FS356
Mazurak Vera

NUFS 356 Physiological Changes of Aging The population is getting older and in coming years there will be more old people than young people. The top killers of today are all related to ageing. They include cancer, CVD and stroke. Overall, aging is a result of decreased immunity combined with apoptosis or programmed cell death. The rate of ageing is dependent on genetics, your environment and lifestyle choices. This process is unavoidable and once it starts there is no reversing it. Aging is a complex process because there are so many contributing factors that operate at the same time in many functional levels. Defining what is old depends on the definers age most of the time but the physiological changes that are associated with aging come at different times for each person. This means aging doesnt start at the same time for each person it is varied. Those physiological signs include: Decreased ability to respond to stressors and stimuli in the environment: meaning that the same stressors and stimuli would have been managed by homeostasis in younger years but they have a larger impact in old age that homeostasis cannot rebalance. Biochemical changes in the tissues Decline in historical capacity in some tissues Increased likeliness of disease
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