Arrival of a stimulus, such as sunlight or temperature, A receptor detects the change in the environment , Sensory Neuron (PNS) transmits impulse from the sense organ towards the CNS, Impulse is transmitted to the Interneuron, which is located in the Spinal Cord, Information is processed in the Spinal Cord (CNS) and formulates a response, Motor Neuron (PNS) transmits impulse away from the CNS, The Motor Neuron activates the Effector, which is typically a muscle or a gland, The effector produces a response (reaction) to the stimulus .

Steps of a Reflex Arc

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