(N/A) Reflex actions are sudden,involuntary responses to stimuli that do not involve conscious thinking.
For example,when we touch a hot object,we withdraw our hand immediately without thinking,as the time taken for conscious processing could cause severe burns.
The sensory nerves that detect the heat are connected to the motor nerves that move the muscles of the hand.
Such a connection of detecting the signal from the nerves (input) and responding to it quickly (output) is called a reflex arc.
The reflex arcs—connections present between the input and output nerves—meet in a bundle in the spinal cord.
Reflex arcs are formed in the spinal cord,and the information (input) simultaneously reaches the brain.
The brain is only made aware of the signal and the response that has taken place.
However,the brain plays no role in the initiation or creation of the reflex response itself.