The route of major parasympathetic outflow from the head is via the ________.
A) sympathetic trunk
B) phrenic nerve
C) vagus nerve
D) sacral nerve

Question

Quizplus · Accepted Answer

The vagus nerve is a major parasympathetic nerve that exits the head and provides parasympathetic innervation to the thorax and abdomen. The sympathetic trunk is not involved in parasympathetic outflow. The phrenic nerve is a motor nerve that controls the diaphragm and is not involved in parasympathetic outflow. The sacral nerve provides parasympathetic innervation to the lower gastrointestinal tract and pelvic organs, but does not exit from the head.

The Route of Major Parasympathetic Outflow from the Head Is