When a body touches a hot or very cold body, a stimulus is generated.
Touch receptors convert this stimulus into a nerve impulse and transmit it to the sensory neurons located in the spinal cord (CNS) via peripheral nerves.
The impulse travels across a synapse to relay neurons
Relay neuron passes impulse across the second synapse to motor neurons.
Now impulse travels along motor neuron to reach the effector (muscle)
Muscle contract and hand is withdrawn quickly (Response)
