Nerves

Question 1

Olfactory function

Answer 1

Sensory, carry afferent impulses for sense of smell

Question 2

Olfactory origin

Answer 2

Arise from olfactory sensory neurons located in olfactory epithelium of nasal cavity

Question 3

Optic origin

Answer 3

Arise from retina of eye to form the optic nerve

Question 4

Optic function

Answer 4

Purely sensory function, carry afferent impulses for sense of smell

Question 5

Oculomotor origin

Answer 5

Extend from ventral midbrain and pass through bony orbit

Question 6

Oculomotor function

Answer 6

Raising eyelid, directing eyeball, constricting pupil, and controlling lens shape for focusing

Question 7

Trochlear origin

Answer 7

Emerge from dorsal midbrain

Question 8

Trochlear function

Answer 8

Supply somatic motor fibers to one of the extrinsic eye muscles

Question 9

Abducens function

Answer 9

Supply somatic motor fibers to lateral reclusive muscle, an extrinsic muscle of the eye

Question 10

Vagus origin

Answer 10

Extends into the thorax and abdomen

Question 11

Vagus function

Answer 11

Regulate heart rate, breathing and digestive system activity. Sensory fibers carry impulses from thoracic and abdominal viscera