What will happen to reflex action if the sensory nerve is damaged?
Answer and explanation
Correct answer: Information about the stimulus will not properly reach the spinal cord
A reflex arc depends on a complete pathway: receptor, sensory neuron, spinal cord, motor neuron, and effector. The sensory nerve carries information from the receptor towards the spinal cord. If it is damaged, the stimulus message may be delayed, weakened, or blocked before reaching the coordinating centre. Consequently the reflex response may become slow or absent. Option A states the direct effect; B, C, and D are unrelated or scientifically unsupported consequences.
Frequently asked questions
What is the correct answer to this question?
Information about the stimulus will not properly reach the spinal cord
Why is this the correct answer?
A reflex arc depends on a complete pathway: receptor, sensory neuron, spinal cord, motor neuron, and effector. The sensory nerve carries information from the receptor towards the spinal cord. If it is damaged, the stimulus message may be delayed, weakened, or blocked before reaching the coordinating centre. Consequently the reflex response may become slow or absent. Option A states the direct effect; B, C, and D are unrelated or scientifically unsupported consequences.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Control and Coordination.
