Type ________ Fibers Have the Largest Diameter Axons

Question

Type ________ fibers have the largest diameter axons.
A) S
B) F
C) A
D) B
E) C

Accepted Answer

Type C fibers have the smallest diameter axons and are involved in the transmission of slow, dull pain. Type A fibers have the largest diameter axons and are involved in the transmission of fast, sharp pain and other sensory information, such as touch and proprioception. Among type A fibers, the diameter decreases in the following order: Aα, Aβ, Aδ, and Aγ. Therefore, choice C is the correct answer as it refers to a category of fibers with large diameter axons.