Moderate

Under normal conditions a nerve impulse is initiated by an appropriate stimulus called:

Correct answer: A. Threshold stimulus

  • A. Threshold stimulus
  • B. Active membrane potential
  • C. Resting membrane potential
  • D. All of the above

Explanation

A threshold stimulus is the minimum effective stimulation needed to initiate a nerve impulse. Resting and active membrane potentials are electrical states, not the initiating stimulus itself.

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