Final answer:
Sodium in the human body plays roles in fluid balance, nerve transmission, and muscle contraction.
Explanation:
Sodium plays several important roles in the human body:
- Fluid balance: Sodium helps maintain the balance of fluids in the body.
- Nerve impulse transmission: It is essential for the transmission of nerve impulses.
- Muscle contraction: Sodium is involved in the process of muscle contraction.
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