Question
Write short note : Reflex action
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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 co-ordination 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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