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Anesthetic chemicals block the voltage gate sodium and potassium channel.

1. Anesthetic chemicals block the voltage gate sodium channel.
2. Anesthetic chemicals block the voltage gate potassium channel.
3. Anesthetic chemicals block both sodium and potassium channels.
4. Anesthetic chemicals do not block any voltage gate channels.

Correct answer: Anesthetic chemicals block both sodium and potassium channels.

Solution

Anesthetics reduce nerve conduction by blocking voltage-gated sodium and potassium channels, which prevents normal action potential generation and recovery. Because both ion movements are needed for a full nerve impulse, blocking both disrupts signaling effectively.

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