Avi broke his ankle skiing.At first,he felt a sharp and intense pain.The next day,the sharp pain was gone,but his ankle throbbed almost all the time.The sharp immediate pain was due to _____; the later throbbing pain was due to _____.
A) unmyelinated axons; myelinated axons
B) myelinated axons; unmyelinated axons
C) pain receptors; pressure receptors
D) pressure receptors; pain receptors

Question

Quizplus · Accepted Answer

The sharp immediate pain is due to signals being transmitted by myelinated axons, which transmit signals quickly and with high intensity. The later throbbing pain is due to signals being transmitted by unmyelinated axons, which transmit signals slowly and with lower intensity.

Avi Broke His Ankle Skiing