The vast majority of blood plasma is composed of which substance ________?
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Answer: C. Water
Explanation
Water acts as the primary solvent and medium that constitutes the vast majority of blood plasma. Approximately ninety to ninety two percent of the total volume of blood plasma is pure water. This high water content allows plasma to dissolve and transport nutrients, hormones, and waste products. Blood plasma is the yellowish liquid component of blood that holds whole blood cells in suspension. Dissolved proteins, electrolytes, glucose, and respiratory gases make up the remaining portion of plasma. Water's high specific heat helps plasma regulate body temperature efficiently across all tissues.
Maintaining proper hydration is vital to ensure adequate blood plasma volume and healthy circulation. Clinical evaluations of plasma composition help physicians diagnose kidney disease, infections, and dehydration. Intravenous saline solutions mimic plasma fluid balance to restore blood volume during medical trauma. Carbon dioxide is transported in plasma mainly as bicarbonate ions rather than being the main constituent. Oxygen is primarily carried by hemoglobin inside red blood cells rather than dissolved in plasma. Glucose is an essential nutrient dissolved in plasma, but it accounts for a very tiny fraction.
- Subject
- Everyday Science
- Category
- Everyday Science
- Topic
- —
- Difficulty
- medium
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