A 79-year-old woman is scheduled to undergo hip replacement surgery after a fracture that was caused by a fall. Which of the following age-related changes may have contributed to the woman's susceptibility to bone fracture?
A) Increased protein synthesis
B) Infections within the synovial capsules of the knees and ankles
C) Loss of neural control of balance
D) Increased bone resorption
Ans: D
The process of bone resorption accelerates with age, resulting in lower bone density. Changes in various aspects of the nervous system accompany the aging process, but a loss of neural control of balance is not normally among these. Infection is never a normal, age-related change and protein synthesis decreases, not increases, with age.
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