Multiple choice

Threshold stimulus is ______ than the resting potential.

  1. slow

  2. less

  3. more

  4. None of the above

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

The threshold stimulus must be more positive (less negative) than the resting membrane potential. Typically, the resting potential is around -70 mV, and threshold is around -55 mV, meaning the membrane must depolarize by about 15 mV to reach threshold and trigger an action potential.