Write short notes on:Reflex action

1.	Write short notes on:Reflex action
Answer» An immediate and involuntary response given to a stimulus from the environment is called a reflex action. Sometimes we react to an incident without any thinking on our part or control over the reaction. This is a response given to a certain stimulus from the surroundings. In such situations, proper control and coordination is achieved even without the intervention of the brain. For example, when our hand touches a hot object, the receptor in the skin detects the stimulus. The sensory neuron sends the impulse to the relay neuron in the spinal cord. The impulses are then sent to motor neurons which cause the muscles of the hand to contract and move away from the hot object. The spinal cord is the center of co-ordination for reflex actions.

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