What Keeps a Nerve Action Potential from Flowing "Backward" in a Neuron

question 36

Multiple Choice

What keeps a nerve action potential from flowing "backward" in a neuron?

• A)Schwann cells keep action potentials flowing one direction
• B)Sodium ions can only move toward a synapse
• C)Chemical synapse receptors form a one-way gate and there is a refractory period after sodium ions are pumped back out
• D)The axon and dendrite have completely different membrane structures
• E)All of the choices are correct

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