Catelin has had a slow throbbing pain in her ankle since she twisted it roller blading last week.These pain signals are traveling along
A) ungated endorphin pathways in the hypothalamus.
B) thin, unmyelinated C fibers.
C) thick, myelinated A-delta fibers.
D) periacqueductal gray neurons in the midbrain.

Question

Quizplus · Accepted Answer

Thin, unmyelinated C fibers transmit slow, dull pain signals from damaged tissue such as Catelin's ankle. These fibers respond to chemical, thermal, and mechanical stimuli and contribute to the sensation of chronic, aching pain.

Catelin Has Had a Slow Throbbing Pain in Her Ankle