The transfer of electrical signals by nerve cells in human body is enabled by
- A. sodium
- B. potassium
- C. iron
- D. sodium and potassium ✓
Correct Answer: D. sodium and potassium
Explanation
The transfer of electrical signals (action potentials) along nerve cells is facilitated by the movement of sodium (Na^+) and potassium (K^+) ions across the cell membrane.
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