Multiple choice

The transmission of a signal by a nerve occurs in ______ phases.

  1. one

  2. two

  3. three

  4. four

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Nerve signal transmission occurs in four distinct phases: resting (polarized), depolarization, repolarization, and hyperpolarization (refractory period). These phases represent the sequential changes in membrane potential during an action potential.