A 66-year-old retired professional basketball player is admitted to the hospital for a total knee replacement due to osteoarthritis. In preparing preoperative teaching for this patient, to the nurse includes which theory of aging to help him understand ho
a. Free radical theory
b. Wear and tear theory
c. Gene theory
d. Cross-link theory
ANS: B
Osteoarthritis is characteristic of degeneration that results from joint usage. This disease is a good example of the wear and tear theory; repeatedly injuring one organ or body system, such as occurs during playing sports, may result in premature aging and diseases such as os-teoarthritis. The free radical theory states that cell damage is a result of the accumulation of oxygen radicals. The gene theory states that genes govern cellular mortality. The cross-link theory is related to the accumulation of cross-linked proteins, which may cause disease.
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