Avi Broke His Ankle Skiing

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

Correct Answer:

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