Which sequence best represents the scientific understanding of a reflex arc?
Answer and explanation
Correct answer: Stimulus → receptor → sensory nerve → spinal cord → motor nerve → effector → response
A reflex arc is the rapid neural pathway that produces an automatic response to a harmful or sudden stimulus. First, a receptor detects the stimulus; a sensory neuron carries the impulse to the spinal cord, where it is processed. A motor neuron then carries the command to an effector such as a muscle, producing the response. Therefore option A gives the correct sequence; the others mix unrelated organs and pathways.
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What is the correct answer to this question?
Stimulus → receptor → sensory nerve → spinal cord → motor nerve → effector → response
Why is this the correct answer?
A reflex arc is the rapid neural pathway that produces an automatic response to a harmful or sudden stimulus. First, a receptor detects the stimulus; a sensory neuron carries the impulse to the spinal cord, where it is processed. A motor neuron then carries the command to an effector such as a muscle, producing the response. Therefore option A gives the correct sequence; the others mix unrelated organs and pathways.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Control and Coordination. Topic: Reflex action.
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