Dehydration is generally a more serious concern in older adults than in younger adults because:
A) older adults lose significantly more water through perspiration.
B) total body water constitutes only 45% of body weight in older adults.
C) renal function increases significantly in patients over 60 years of age.
D) a person's total body water increases by 10% for each 10 years of life.
Answer: B) total body water constitutes only 45% of body weight in older adults.
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