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Questions and Answers
What proportion of an infant's body weight is accounted for by water?
What proportion of an infant's body weight is accounted for by water?
- Less than 50%
- 60%
- 50%
- 70% to 80% (correct)
What percentage of total body fluid does the intracellular fluid (ICF) constitute in adults?
What percentage of total body fluid does the intracellular fluid (ICF) constitute in adults?
- Two-thirds (correct)
- One-half
- Three-quarters
- One-third
How much does the body weight of an individual vary in 24 hours in good health?
How much does the body weight of an individual vary in 24 hours in good health?
- 0.5 lb
- 1 lb
- 1 kg
- Less than 0.2 kg (correct)
What is the approximate percentage of body water in adults older than 60 years of age?
What is the approximate percentage of body water in adults older than 60 years of age?
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Which group generally has a lower percentage of body water?
Which group generally has a lower percentage of body water?
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Study Notes
Body Water Composition
- Infants' body weight is approximately 70-80% water.
- In adults, the intracellular fluid (ICF) constitutes around 60-70% of the total body fluid.
- An individual's body weight can fluctuate by around 1-2 kg in 24 hours in good health.
- Adults older than 60 years of age have an approximate percentage of body water of 50-60%.
- Older adults and females generally have a lower percentage of body water compared to younger adults and males.
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