All of the following are theories regarding causes of aging...

Name: Problem 14, Chapter 21: Human Biology Concepts and Current Issues
Uploaded: 2021-08-27T23:33:39-08:00
Duration: 1 min 40 s
Channel: Joanna Quigley
Description: All of the following are theories regarding causes of aging except: a. Cells run out of telomeres and stop dividing. b. Cortisol production increases, and the stress response contributes to aging. c. Cells can no longer repair themselves properly, and damage accumulates. d. A decline in one critical body system induces parallel declines in others.

All of the following are theories regarding causes of aging except: a. Cells run out of telomeres and stop dividing. b. Cortisol production increases, and the stress response contributes to aging. c. Cells can no longer repair themselves properly, and damage accumulates. d. A decline in one critical body system induces parallel declines in others.

All of the following are theories regarding causes of aging except:
a. Cells run out of telomeres and stop dividing.
b. Cortisol production increases, and the stress response contributes to aging.
c. Cells can no longer repair themselves properly, and damage accumulates.
d. A decline in one critical body system induces parallel declines in others.

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Key Concepts

Inter-System Decline

This concept involves the notion that the declining function of one critical body system can induce parallel declines in other systems. While it highlights the interdependence of bodily systems, it is less recognized as a primary or direct mechanism driving the aging process compared to other theories.

Stress and Hormonal Changes

This idea posits that chronic stress leads to persistent elevation of stress hormones like cortisol. Over the long term, these hormonal changes can negatively impact numerous bodily systems, thereby accelerating the aging process.

Telomere Attrition

This concept proposes that with each cell division, the telomeres—protective DNA sequences at the ends of chromosomes—shorten over time. Eventually, this shortening limits a cell's ability to divide further, leading to cellular senescence and contributing to the aging process.

Accumulation of Cellular Damage

This theory suggests that over time, cells accumulate various types of damage, such as oxidative damage, which overwhelms repair mechanisms. The accumulation of unrepaired damage impairs cellular function, leading to the gradual decline in bodily functions seen in aging.

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