Q. Among Sodium, Potassium , Magnesium and Iodine which is / are required for transmission of nerve impulses?
Answer: Sodium , Potassium & Magnesium
Notes: Sodium, Potassium and Magnesium are required for transmission of nerve impulses. Nerve impulse is a signal transmitted along a nerve fibre. It consists of a wave of electrical depolarization that reverses the potential difference across the nerve cell membranes.

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