Cranial Nerves

Question 1

Cranial nerves originate from the?

Answer 1

Brain nuclei and innervate structures of the head and neck

Question 2

The vagus nerve innervates

Answer 2

structures in the lower body as well as the structures of the head and neck

Question 3

How many pairs of cranial nerves do mammals have?

Answer 3

12 pair

Question 4

____ of the cranial nerves are mixed nerves

Answer 4

four

Question 5

Eight cranial nerves have been designated as being either ____ or ____ based on the MAJORITY of the neuron fiber type that comprises them

Answer 5

sensory or motor

Question 6

Afferent

Answer 6

sensory

Question 7

Efferent

Answer 7

motor

Question 8

Sensory neurons

Answer 8

receptors

Question 9

Somatic motor neuron

Answer 9

skeletal muscles

Question 10

Autonomic motor neurons

Answer 10

smooth muscle, cardiac muscle, glands

Question 11

Efferent (motor) neuron cell bodies are located

Answer 11

within specific brain nuclei

Question 12

Post-Synaptic autonomic neuron cell bodies are located

Answer 12

within autonomic (PSNS) ganglia

Question 13

Parasympathetic ganglia of the head include ganglia of

Answer 13

CN III, VII, & IX

Question 14

Afferent (sensory) neuron cell bodies are located

Answer 14

within specific cranial ganglia

Question 15

Nerves of the head

Answer 15

Olfactory (I) S
Optic (II) S
Oculomotor (III) M
Trochlear (IV) M
Trigeminal (V) B
Abducens (VI) M
Facial (VII) B
Vestibulocochlear (VIII) S
Glossopharyngeal (IX) B
Vagus (X) B
Accessory (XI) M
Hypoglossal (XII) M

Question 16

Sensory fibers of CN I transmit impulses associated with the sense of

Answer 16

smell, including pheromone perception from the vomeronasal organ

Question 17

Olfactory epithelium covers the rostral surface of the

Answer 17

cribriform plate of the ethmoid bone

Question 18

Olfactory receptor cells are _____ neurons whose cell bodies are located within the ______

Answer 18

bipolar, olfactory epithelium

Question 19

Cilia of the dendrites of olfactory receptor cells bind

Answer 19

odorant molecules

Question 20

Collective axons of these bipolar neurons pass through the foramina of the cribiform plate of the ethmoid bone as the

Answer 20

olfactory nerves

Question 21

The axons of these neurons (olfactory receptor cells) synapse on neurons within the

Answer 21

olfactory bulbs

Question 22

Sensory fibers of CNII transmit

Answer 22

visual impulses in response to light stimuli

Question 23

Optic nerve comprised of the collective axonal processes of the

Answer 23

ganglion cells of the retina

Question 24

The optic nerve begins at the ____ and passes through the ____

Answer 24

optic disk, optic canal

Question 25

What nerves supply somatic motor innervation to the muscles of the eye

Answer 25

III, IV, VI

Question 26

What does CN IV supply?

Answer 26

dorsal oblique m

Question 27

What does CN VI supply?

Answer 27

lateral rectus & retractor bulbi m