Final answer:
The cell bodies of the pain fibers from the uterine cervix are located in the dorsal root ganglion, and these fibers extend to the dorsal horn of the spinal cord.
Step-by-step explanation:
The cell bodies of the pain fibers coming from the uterine cervix are located in the dorsal root ganglion. Specifically, these sensory neurons are unipolar and their cell bodies reside within the ganglia, which are attached to the posterior nerve roots of spinal nerves. The dorsal root ganglia act as relay points where the pain fibers from the periphery, such as the uterine cervix, send their signals towards the central nervous system (CNS). Once inside the spinal cord, these pain fibers extend their axons to the dorsal horn, where they synapse with second neurons, such as the neurons of the spinothalamic tract, which then project to the thalamus and subsequently to the cerebral cortex.