1.

Press your thumb gently on the tip of a sharpened pencil. Later press it on the blunt end of the pencil. How do you feel? Why?

Answer»
  • When we press our thumb gently on the tip of a sharpened pencil it makes us feel pain. 
  • The sensory receptors sense the sharpened pencil’s press and the message is sent to brain through sensory nerve. 
  • Then the brain interprets the message and sends signals to feel pain through motor nerves. 
  • When we press our thumb with the blunt end of the pencil we do not feel pain because the sensory receptors (touch receptors) sends the message to brain through sensory nerve. 
  • Brain interprets the message and sends signals to our thumb to feel soft through motor nerves.


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