In a reflex arc, what is the correct order of structures?
Answer and explanation
Correct answer: C. Receptor, sensory neurone, relay neurone, motor neurone, effector
- Step 1: The impulse starts at a receptor. Step 2. It passes along the sensory neurone, relay neurone and motor neurone to the effector. Answer: Receptor, sensory neurone, relay neurone, motor neurone, effector. Why not the others: The other orders put the neurones in the wrong sequence.
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