Body Composition and Body Fluids

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Questions and Answers

What is the composition of body fluid compartments?

  • Extracellular fluid and plasma
  • Intracellular fluid and extracellular fluid (correct)
  • Plasma and red blood cells
  • Intracellular fluid and plasma

What is the most significant factor causing variation in the percentage of total body water?

  • Age (correct)
  • Body size
  • Composition of body fluids
  • Gender

Why is the percentage of total body water lower in females compared to males?

  • Due to higher percentage of fats in females (correct)
  • Due to higher percentage of protein in females
  • Due to higher percentage of minerals in females
  • Due to higher percentage of carbohydrates in females

What is the relationship between the percentage of fats and the percentage of water in the body?

<p>Increased percentage of fats results in decreased percentage of water (B)</p> Signup and view all the answers

In which group does the percentage of total body water decrease compared to others?

<p>Elderly individuals (A)</p> Signup and view all the answers

What percentage of the total body weight does interstitial fluid account for?

<p>15% (A)</p> Signup and view all the answers

Which of the following is NOT considered a body fluid compartment?

<p>Intracellular fluid (A)</p> Signup and view all the answers

What is the main cation in the intracellular fluid?

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

Which method is used to measure body fluid volumes based on injecting a substance that stays in only one compartment and then taking a sample to measure the volume of distribution?

<p>Indicator dilution method (D)</p> Signup and view all the answers

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

<p>$Plasma \times \frac{100}{100 - PCV}$ (D)</p> Signup and view all the answers

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