The major constituent of blood plasma is___________?
Correct answer: C. Water
- A. Protein
- B. NaCl
- C. Water
- D. Cholesterol
Explanation
Water forms about 90 to 92% of blood plasma and acts as the solvent in which proteins, salts, nutrients, hormones and wastes are transported. Protein is the most abundant solid component of plasma, so students may select it while overlooking that water is the major constituent overall.
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About Biological Importance of Water
Water supports life through its polarity, hydrogen bonding and ability to dissolve ionic and polar substances. Its high specific heat, heat of vaporization, cohesion, adhesion and incompressibility help regulate temperature, transport materials and maintain structure, while hydrolysis and osmosis depend directly on water.
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