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JAMB Biology 2004 Question 31

Question 31

Nervous Coordination

The two key cations involved in the action potential of nervous transmissions are

  1. A.Na+ and Fe2+
  2. B.Mg2+ and K+
  3. C.Na+ and K+
  4. D.Fe2+ and Mg2+
Show the answer and explanation

Answer: C (Na+ and K+)

Explanation

A nerve impulse happens when sodium ions rush into the nerve fibre and potassium ions then move out. So Na+ and K+ are the key ions.