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Multiple Choice
The majority of water in the human body is located in which of the following compartments?
A
Inside the cells (intracellular fluid)
B
In the interstitial fluid (between cells)
C
In the blood plasma
D
In the digestive tract
Verified step by step guidance
1
Understand the concept of fluid compartments in the human body. The body contains three main fluid compartments: intracellular fluid (inside cells), interstitial fluid (between cells), and blood plasma (within blood vessels).
Recall that intracellular fluid is the largest compartment, making up approximately 60% of the total water in the human body. This is because cells are the primary structural and functional units of the body, and they require a significant amount of water for metabolic processes.
Compare the relative sizes of the other compartments. Interstitial fluid accounts for about 25% of the total water, and blood plasma makes up roughly 8%. The digestive tract contains water, but it is not considered a major fluid compartment in this context.
Eliminate options based on the relative proportions of water in each compartment. Since intracellular fluid contains the majority of water, it is the correct answer.
Conclude that the majority of water in the human body is located inside the cells, in the intracellular fluid compartment.