Physiology of Body Fluids

Physiology

An overview of body fluid composition, distribution between compartments, and their physiological functions in maintaining homeostasis.

Biology Medicine Health

10 Questions Medium Ages 16+ Oct 8, 2026

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This study set covers Physiology through 10 practice questions. An overview of body fluid composition, distribution between compartments, and their physiological functions in maintaining homeostasis. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

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Browse all 10 questions from the Physiology of Body Fluids study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 What percentage of total body weight in humans is typically represented by total body water (TBW)?

A 10-20%
B 45-75%
C 80-90%
D 5-10%

2 What is the approximate pH level of Extracellular Fluid (ECF)?

A 7.0
B 6.8
C 7.4
D 8.0

3 Which substance is found in high quantities in Intracellular Fluid (ICF)?

A Sodium
B Potassium
C Bicarbonate
D Glucose

4 Which of the following is a primary component of Extracellular Fluid (ECF)?

A Proteins
B Magnesium
C Sodium
D Phosphates

5 What is the primary function of water inside cells regarding tissue structure?

A Temperature regulation
B Energy production
C Maintaining form and texture
D Digestion

6 What is the pH level of Intracellular Fluid (ICF)?

A 7.0
B 7.4
C 7.8
D 6.5

7 Which of these is considered an Extracellular Fluid (ECF) compartment?

A Cytoplasm
B Plasma
C Nucleus
D Endoplasmic Reticulum

8 Water plays a vital role in which physiological process related to body balance?

A Maintaining normal body temperature
B Bone density
C Vision
D Hair growth

9 What fraction of the total body is composed of fluids?

A Less than 1/3
B Exactly 1/2
C More than 2/3
D 1/4

10 Which of the following is found in high quantities in Intracellular Fluid (ICF)?

A Chlorides
B Oxygen
C Proteins
D Fatty acids

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