Which of the following statements regarding the parasympathetic nervous system (PNS) is TRUE?
A、 The sacral fibers originate from the white matter of the second, third, and fourth sacral nerves.
B、 Preganglionic fibers are myelinated fibers analogous to those in the sympathetic nervous system (SNS) and terminate in ganglia next to the spinal cord.
C、 The ratio of preganglionic to postganglionic fibers in the PNS is the same as in the SNS.
D、 Postganglionic neurons are located in or near the organ to be innervated.
E、 Cranial nerve X has the least innervation of all PNS nerves.
发布时间:2025-11-13 03:56:44