Body Composition and Body Fluids: Distribution and Measurement
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Questions and Answers

What is the total body water (TBW) as a percentage of the total body weight?

  • 60% (correct)
  • 80%
  • 20%
  • 40%

    • Which substance is commonly used in the measurement of total body water?

  • Thiosulfate
  • Evans blue dye
  • Antipyrine
  • Tritium oxide (correct)

    • What is the percentage of water in the body composition of a 70kg adult male?

  • 15%
  • 60% (correct)
  • 7%
  • 18%

    • What is the main cation found in the intracellular fluid (ICF)?

    <p>Potassium (K+)</p> Signup and view all the answers

    How does the percentage of total body water (TBW) vary with age?

    <p>It decreases with age</p> Signup and view all the answers

    How is the volume of distribution calculated in the indicator dilution method?

    <p>$amount\ injected-amount\ excreted\ or\ metabolized/concentration\ of\ substance\ in\ the\ sample$</p> Signup and view all the answers

    Why is the percentage of total body water (TBW) lower in females than in males?

    <p>Females have a higher percentage of fat</p> Signup and view all the answers

    How can blood volume be calculated from plasma and packed cell volume (PCV)?

    <p>$Blood = Plasma \times 100/100-PCV$</p> Signup and view all the answers

    What is the intracellular fluid (ICF)?

    <p>Fluid inside the cells</p> Signup and view all the answers

    In which group is the percentage of total body water (TBW) highest?

    <p>Thin-tall subjects</p> Signup and view all the answers

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