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nmdcat.online July 7, 2026

During sensory transduction, a generator potential that reaches threshold directly triggers

A. Neurotransmitter release from the receptor cell
B. An action potential in the sensory axon
✓
C. The opening of mechanically-gated channels
D. Sensory adaptation

📝 Explanation

A generator potential is a graded depolarization in the sensory nerve ending itself. If it reaches threshold, it opens voltage-gated sodium channels at the first node of Ranvier, firing an action potential.

📖 Additional Information

  • Neurotransmitter release from the receptor cell
  • An action potential in the sensory axon
  • The opening of mechanically-gated channels
  • Sensory adaptation

A generator potential is a graded depolarization in the sensory nerve ending itself. If it reaches threshold, it opens voltage-gated sodium channels at the first node of Ranvier, firing an action potential.

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