Question

Reflex arc is the pathway of impulses to and from the spinal cord.

• A. response to external stimuli
• B. instantaneous response without thought

Answer 1

The correct option is A

response to external stimuli

Reflex arc is the pathway of impulses to and from the spinal cord which helps in generating appropriate reflex actions. So, it includes:
1. The receptor organ which receives the stimulus.
2. A sensory neuron which carries the impulse from the sensory organ to the spinal cord.
3. A relay neuron or an intermediate neuron which transmits the signal further.
4. A motor neuron which carries the impulse from the spinal cord to the effector organ.
5. The effector organ.