Generally, Nerve Impulses Do Not Move "Backward" Along a Series

question 6

Multiple Choice

Generally, nerve impulses do not move "backward" along a series of neurons. What is the reason for this?

• A) There is a short refractory period during which sodium gates cannot open and an action potential cannot move backwards.
• B) Once the signal has passed, the nerves separate from each other so it cannot go backwards.
• C) At the synapse, the presynaptic membrane has receptors, ensuring the transmission only goes one way.
• D) Once the sodium channels open, they cannot be closed.
• E) The resting potential of the neuron prevents it from conducting an impulse.

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