Reflex arcs · Physiology

The receptor involved in the stretch reflex is the:

  1. Golgi tendon organ
  2. Muscle spindle
  3. Free nerve ending
  4. Pacinian corpuscle
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Correct answer: Muscle spindle

Muscle spindles detect changes in muscle length. They initiate the stretch reflex to maintain muscle tone.

Difficulty: Medium Question 4 of 20

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