Why Are Action Potentials Conducted Usually in One Direction Along

question 42

Multiple Choice

Why are action potentials conducted usually in one direction along an axon?

• A) The nodes of Ranvier conduct potentials only in one direction.
• B) The brief refractory period prevents reopening of voltage-gated sodium channels.
• C) The axon hillock has a higher membrane potential than the terminals of the axon.
• D) Voltage-gated channels for both Na+ and K+ open in only one direction.

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