Our sensory neurons communicate with each other through the…

Our sensory neurons communicate with each other through the language of electricity, called action potentials (AP). If your fingertip gets poked by a pin, the pain receptors or nociceptors in your fingertip generate action potentials to transmit the pain information to the brain. What happens when your fingertip gets burned over the hot stove? How does the brain differentiate between milder and stronger pain?  Which of the following is a result of a stronger stimulus? (Hint: AP has a fixed amplitude because it cannot exceed the peak point represented by +30mV).