Question

which of the following cranial nerves delivers parasympathetic fibers?
answer
vagus
trigeminal
trochlear
glossopharyngeal
vestibulocochlear

Explanation:

The vagus nerve (cranial nerve X) is a major contributor to the parasympathetic nervous system. It innervates various organs such as the heart, lungs, and digestive tract, regulating functions like heart rate, digestion, and bronchoconstriction. The trigeminal nerve (cranial nerve V) is mainly involved in sensory (facial sensation) and motor (mastication) functions. The trochlear nerve (cranial nerve IV) controls eye movement. The glossopharyngeal nerve (cranial nerve IX) has some parasympathetic functions (e.g., salivary gland secretion), but its role is more limited compared to the vagus. The vestibulocochlear nerve (cranial nerve VIII) is responsible for hearing and balance.

Answer:

Vagus