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Which of the following components is NOT part of a simple stretch reflex arc?

easy MCQ 2 marks Class 11 · Biology · Neural Control and Coordination
  1. Muscle spindle
  2. Sensory neuron
  3. Interneuron
  4. Hormone release
Answer
Hormone release

The correct answer is Hormone release — Therefore the correct answer is hormone release.

Step-by-step solution

  1. Identify the core elements of a stretch reflex: muscle spindle, sensory neuron, interneuron, motor neuron, and muscle fibre.
  2. Notice that hormone release is not involved in the immediate neural transmission of a reflex.
  3. Therefore the correct answer is hormone release.
Common mistake: Confusing hormone release with neurotransmitter action

Concept tested: Components of stretch reflex

Published · How this solution was prepared and checked

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