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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?

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

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

Elderly individuals (A) Signup and view all the answers

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

15% (A) Signup and view all the answers

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

Intracellular fluid (A) Signup and view all the answers

What is the main cation in the intracellular fluid?

Potassium (K+) (B) 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?

Indicator dilution method (D) Signup and view all the answers

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

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