Jonathan tripped on a sprinkler during a game of flag football,and felt a sharp pain as he broke his ankle.Later on,after he returned home from the emergency room with a new cast,he felt a dull,aching pain in his broken ankle.Which of the following is the best explanation for Jonathan's experience?
A) The sharp pain resulted from the transmission of messages along C fibers,and as the rate of signaling dropped,the quality of the pain changed to dull and aching.
B) The sharp pain resulted from the activation of nociceptors that respond to mechanical injury,whereas the dull pain resulted from the activation of nociceptors that respond to chemicals released by damaged cells.
C) The sharp pain resulted from the transmission of messages along C fibers,and the dull pain resulted from the transmission of messages along A$\delta$ fibers.
D) The sharp pain resulted from the transmission of messages along A$\delta$fibers,and the dull pain resulted from the transmission of messages along C fibers.

Question

Quizplus · Accepted Answer

The sharp pain is typically transmitted by Aδ fibers, which are myelinated and conduct signals quickly, leading to a sharp, immediate pain sensation. The dull, aching pain is transmitted by C fibers, which are unmyelinated and conduct signals more slowly, resulting in a prolonged, aching sensation.

Jonathan Tripped on a Sprinkler During a Game of Flag δ\deltaδ

Jonathan Tripped on a Sprinkler During a Game of Flag $\delta$