If skin receptors are active but the message is not reaching the spinal cord, which part of the reflex arc is most likely affected?
Answer and explanation
Correct answer: Sensory nerve
In a reflex arc, the receptor detects the stimulus and the sensory nerve carries the impulse from the skin towards the spinal cord. Since the receptors are already active but the message fails before reaching the spinal cord, the sensory nerve is the most likely damaged part. A motor nerve carries commands away from the spinal cord, the muscle performs the response, and the thyroid is unrelated here.
Frequently asked questions
What is the correct answer to this question?
Sensory nerve
Why is this the correct answer?
In a reflex arc, the receptor detects the stimulus and the sensory nerve carries the impulse from the skin towards the spinal cord. Since the receptors are already active but the message fails before reaching the spinal cord, the sensory nerve is the most likely damaged part. A motor nerve carries commands away from the spinal cord, the muscle performs the response, and the thyroid is unrelated here.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Control and Coordination. Topic: Reflex action.
Student feedback
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
