At home with the flu, Stan is aching all over. Pain messages are traveling on the __________ pathway via __________ fibers.
A) slow; unmyelinated
B) slow; myelinated
C) fast; unmyelinated
D) fast; myelinated

Question

Quizplus · Accepted Answer

When the body is experiencing pain due to illness or injury, the pain messages are transmitted on the slow pathway via unmyelinated fibers. Myelination of the fibers would speed up the transmission, but they are generally not present in pain fibers. Therefore, slow and unmyelinated fibers are the most likely pathway for pain messages.

At Home with the Flu, Stan Is Aching All Over