Lab 5 Review: Peripheral Nervous System

Question 1

changing the shape of the lens to focus light precisely on the retina

Answer 1

accommodation

Question 2

presbyopia

Answer 2

when older people’s lenses are denser and less flexible/elastic and accommodating resulting in impaired vision

Question 3

how many spinal nerves are there

Answer 3

31: 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, 1 coccygeal

Question 4

respond to touch, pressure, vibration,
stretch, and itch

Answer 4

mechanoreceptors

Question 5

respond to chemicals (e.g., smell,
taste, changes in blood chemistry)

Answer 5

chemoreceptors

Question 6

sensitive to changes in temperature

Answer 6

thermoreceptors

Question 7

respond to light energy

Answer 7

photoreceptors

Question 8

sensitive to pain-causing
stimuli (e.g. extreme heat or cold,
excessive pressure, chemicals)

Answer 8

nociceptors (“no sir, ‘ceptors”)

Question 9

Nerve I

Answer 9

olfactory

Question 10

Nerve II

Answer 10

optic nerve

Question 11

Nerve III

Answer 11

oculomotor nerve

Question 12

Nerve IV

Answer 12

Trochlear nerve

Question 13

Nerve V

Answer 13

Trigeminal nerve

Question 14

Nerve VI

Answer 14

Abducens nerve

Question 15

Nerve VII

Answer 15

Facial nerve

Question 16

Nerve VIII

Answer 16

Vestibulocochlear nerve

Question 17

Nerve IX

Answer 17

Glossopharyngeal nerve

Question 18

Nerve X

Answer 18

Vagus nerve

Question 19

Nerve XI

Answer 19

Accessory nerve

Question 20

Nerve XII

Answer 20

Hypoglossal nerve