Extracellular fluid contains _ abundantly.
Correct answer: C. Sodium ions
- A. Calcium ions
- B. Potassium ions
- C. Sodium ions
- D. Magensium ions
Explanation
The primary cation in the extracellular fluid (the fluid outside the cells, including blood plasma) is the sodium ion (Na+). It plays a crucial role in maintaining fluid balance and nerve impulse transmission. Potassium (K+) is the primary intracellular cation.
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