A Nerve Impulse Is Caused by

question 44

Multiple Choice

A nerve impulse is caused by

• A) the movement of a sodium ion all the way from dendrite to axon tip.
• B) the movement of a potassium ion all the way from dendrite to axon tip.
• C) the movement of sodium ions from a dendrite to an axon tip and the movement of potassium ions from the an axon tip to a dendrite.
• D) a change in the difference in positive and negative ions on the outer and inner surfaces of the neuron membrane, a change that opens adjacent channels and propagates its flow.
• E) a change in the difference in sugar molecules on the outer and inner surfaces of the neuron membrane that opens adjacent channels.

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