Question

almost 75 percent of all parasympathetic outflow travels along the ______ nerve(s).
glossopharyngeal
trigeminal
splanchnic
vagus
facial

Explanation:

The vagus nerve is the main contributor to the parasympathetic outflow. It is the tenth cranial nerve and has a wide distribution, affecting many organs. The glossopharyngeal (IX), trigeminal (V), splanchnic (sympathetic), and facial (VII) nerves do not carry 75% of the parasympathetic outflow.

Answer:

vagus