Multiple choice

Propagation of nerve impulses is the result of local currents causing each part of the neuron:

  1. To remain below threshold potential

  2. To reach threshold potential

  3. To return to resting potential

  4. To remain at resting potential
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Local currents flow from an active region to an adjacent inactive region, causing the membrane potential in the inactive region to rise until it reaches the threshold potential, triggering a new action potential.

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