Spencer, who is 55 years old, didn't realize how much his physical appearance had changed until he saw a picture of himself taken 20 years ago. Spencer's gradual change in physical appearance was due to _____.

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Quizplus · Accepted Answer

Senescence refers to the natural and gradual physical decline that occurs as a person ages. This includes changes in physical appearance, such as wrinkles, gray hair, and changes in body composition. Homeostasis refers to the body's ability to maintain stability and balance in response to environmental changes, and is not directly related to changes in physical appearance. Organ reserve refers to the extra capacity of organs and physiological systems that can be called upon in times of stress or need, and is not directly related to changes in physical appearance. Allostasis refers to the process of maintaining stability and balance in response to physiological and environmental challenges, and may contribute to changes in physical appearance over time, but is not as specific to aging as senescence.

Spencer, Who Is 55 Years Old, Didn't Realize How Much