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BIO NMDCAT Neurons
nmdcat.online July 7, 2026

The absolute refractory period of a nerve fiber serves a critical physiological function by

A. Increasing the amplitude of action potentials
B. Allowing summation of action potentials
C. Limiting the maximum frequency of nerve impulses
✓
D. Reversing the direction of impulse propagation

📝 Explanation

Because a neuron cannot fire another action potential during the absolute refractory period regardless of stimulus strength, this period sets a strict upper limit on how frequently the neuron can fire.

📖 Additional Information

  • Increasing the amplitude of action potentials
  • Allowing summation of action potentials
  • Limiting the maximum frequency of nerve impulses
  • Reversing the direction of impulse propagation

Because a neuron cannot fire another action potential during the absolute refractory period regardless of stimulus strength, this period sets a strict upper limit on how frequently the neuron can fire.

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