If the spinal cord is normal but the response message does not reach the muscle that pulls the hand away, which part may be affected?
Answer and explanation
Correct answer: Motor nerve
A reflex response follows the sequence receptor, sensory nerve, spinal cord, motor nerve, and effector muscle. The spinal cord is stated to be normal, but the command does not reach the muscle, so the motor nerve carrying the outgoing impulse is the most likely affected part. The receptor and sensory nerve belong to the incoming pathway, while the forebrain is not required for this immediate withdrawal response.
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What is the correct answer to this question?
Motor nerve
Why is this the correct answer?
A reflex response follows the sequence receptor, sensory nerve, spinal cord, motor nerve, and effector muscle. The spinal cord is stated to be normal, but the command does not reach the muscle, so the motor nerve carrying the outgoing impulse is the most likely affected part. The receptor and sensory nerve belong to the incoming pathway, while the forebrain is not required for this immediate withdrawal response.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Control and Coordination.
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