Reflex Action


 
 
Concept Explanation
 

Reflex Action

Reflex action: What happens when you touch something hot or your finger is pricked by a needle? You immediately pull your hand away, without even thinking why you are doing so. Such sudden involuntary responses to stimuli are examples of reflex action. The response may be different when your conscious thought process is involved. For example, when a doctor pricks you with an injection needle to inject a medicine into your arm, you do not withdraw your arm immediately. Your conscious thinking tells you that the medicine is being administered to cure your disease. In this case, a message from the spinal cord goes to the cerebrum, the thinking part of your brain, and your thinking brain directs your arm to bear the pain and not pull away.

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Sample Questions
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Question : 1

The ________________ is the Centre of reflex action.

Right Option : C
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Question : 2

Reflex action immediately involves ______________-

Right Option : A
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Question : 3

A reflex arc is formed by a sensory nerve and a motor nerve joined by a connecting nerve present in the _______________________.

Right Option : C
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