Question 1

Which cranial nerve is responsible for transmitting visual information from the retina to the brain?

Accepted Answer

Optic nerve (CN II)

Question 2

A patient presents with loss of sensation in the forehead, upper jaw, and lower jaw, as well as difficulty chewing. Which cranial nerve is most likely affected?

Accepted Answer

Trigeminal nerve (CN V)

Question 3

Which cranial nerve innervates the lateral rectus muscle of the eye, allowing for abduction of the eyeball?

Accepted Answer

Abducens nerve (CN VI)

Question 4

Which cranial nerve is responsible for taste sensation from the anterior two-thirds of the tongue and innervates muscles of facial expression?

Accepted Answer

Facial nerve (CN VII)

Question 5

The parasympathetic division of the autonomic nervous system is also known as the craniosacral division because its preganglionic neurons originate from which locations?

Accepted Answer

Brainstem and spinal cord segments S2-S4

Question 6

Which structure is the most superficial layer of the eye and acts as a point of attachment for the extrinsic eye muscles?

Accepted Answer

Sclera

Question 7

A lesion in the vagus nerve (CN X) would most likely affect which of the following functions?

Accepted Answer

Sensory innervation of the larynx and parasympathetic control of thoracic and abdominal organs

Question 8

Which cranial nerve is responsible for transmitting auditory and equilibrium information from the inner ear to the brain?

Accepted Answer

Vestibulocochlear nerve (CN VIII)

Question 9

A patient with a perforated tympanic membrane would most likely experience which of the following symptoms?

Accepted Answer

Reduced ability to transmit sound vibrations to the ossicles, resulting in hearing loss

Question 10

Which of the following best describes the organization of the autonomic nervous system (ANS)?

Accepted Answer

A two-neuron pathway with a preganglionic neuron in the CNS and a postganglionic neuron in the PNS

Question 11

Which of the following is a function of the ciliary body in the eye?

Accepted Answer

Producing aqueous humor and controlling the shape of the lens

Question 12

Which cranial nerve innervates the trapezius and sternocleidomastoid muscles?

Accepted Answer

Accessory nerve (CN XI)

Question 13

Which of the following is the correct order of structures through which light passes as it travels through the eye to reach the photoreceptors?

Accepted Answer

Cornea → Lens → Vitreous humor → Retina

Question 14

Which cranial nerve is responsible for motor innervation to the muscles of the tongue?

Accepted Answer

Hypoglossal nerve (CN XII)

Question 15

Which of the following best describes the function of the organ of Corti?

Accepted Answer

It contains hair cells that convert sound vibrations into nerve impulses

Question 16

Which of the following is a key difference between the sympathetic and parasympathetic divisions of the autonomic nervous system?

Accepted Answer

Sympathetic division has a thoracolumbar origin; parasympathetic has a craniosacral origin

Question 17

A patient is unable to move their eye laterally. Which cranial nerve is most likely damaged?

Accepted Answer

Abducens nerve (CN VI)

Question 18

Which of the following is true regarding the nerve plexuses formed by spinal nerves?

Accepted Answer

Plexuses ensure that injury to a single spinal nerve does not result in total loss of innervation to a muscle

Question 19

Which cranial nerve is responsible for the sense of smell?

Accepted Answer

Olfactory nerve (CN I)

Question 20

Which of the following symptoms would most likely occur in a patient with glaucoma if blood flow to the neural tunic (retina) is disrupted?

Accepted Answer

Reduced vision and possible damage to the optic nerve

Peripheral Nervous System, Autonomic Nervous System, and Special Senses: Eye and Ear

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