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1. Which of the following cranial nerves is responsible for
transmitting sensory information from the face, mouth, and
anterior two-thirds of the tongue?
a) Trigeminal nerve
b) Facial nerve
c) Glossopharyngeal nerve
d) Vagus nerve
*Answer: a) Trigeminal nerve*
Rationale: The trigeminal nerve (CN V) is the largest
cranial nerve and has three branches: ophthalmic,
maxillary, and mandibular. It conveys somatosensory
information from the face, mouth, and anterior two-thirds
of the tongue, as well as motor innervation to the muscles
of mastication.
2. Which of the following structures is part of the
vestibular system and contains hair cells that detect linear
acceleration and deceleration?
a) Semicircular canals
b) Utricle
c) Saccule
d) Cochlea
*Answer: c) Saccule*
Rationale: The vestibular system consists of two otolith
organs (utricle and saccule) and three semicircular canals.
The otolith organs contain hair cells that are embedded in a
gelatinous matrix with calcium carbonate crystals
(otoconia). The saccule is oriented vertically and responds
to linear acceleration and deceleration in the vertical plane,
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