Multiple Choice
In the context of blood composition, serum is best described as blood plasma minus its what?
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17. The Blood
Introduction To Blood
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In an adult human, approximately what percentage of blood plasma is water?
A
About 5%
B
About 55%
C
About 90–92%
D
About 25%
Verified step by step guidance1
Understand that blood plasma is the liquid component of blood in which blood cells are suspended.
Recall that plasma is primarily composed of water, along with proteins, electrolytes, nutrients, and waste products.
Recognize that the water content in plasma is very high because it serves as a solvent for transporting substances throughout the body.
Know that the typical percentage of water in blood plasma is around 90–92%, which is much higher than the other given options.
Therefore, the correct answer is that approximately 90–92% of blood plasma is water.
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