What is a key feature of C fibers related to pain sensation?

C fibers are small-diameter nerve fibers that play a critical role in the transmission of pain signals, particularly in the context of chronic pain and the healing process. They are unmyelinated or lightly myelinated, which leads to slower conduction velocities compared to A-delta fibers, which are responsible for transmitting acute pain sensations rapidly. Due to their structure and function, C fibers are activated during tissue damage and inflammation, contributing to the sensations of dull, throbbing, or aching pain that often occurs during healing. This signaling is essential, as it helps the body respond to ongoing injury and promotes protective behaviors that can assist in recovery.

The option mentioning that they transmit pain signals instantly does not apply, as C fibers are characterized by slower signal transmission. While it is true that some pain fibers respond to external injuries, C fibers are particularly noted for their role during the healing process rather than being limited to responding only to such injuries. Additionally, the reference to myelination does not accurately describe C fibers, as they lack significant myelination, differentiating them from other types of fibers that do convey acute pain sensations rapidly.