Exam #2

Question 1

Olfactory 1

type and function

Answer 1

fiber type: sensory

function: smell

Question 2

optic 2

Answer 2

fiber type: sensory

function: vision

Question 3

oculomotor 3

Answer 3

mixed (primarily motor)
eyeball and eyelid movement, pupil constriction, change of lens shape for near vision
proprioception

Question 4

trochlear nerve 4

Answer 4

fiber type: mixed mainly motor

Function: eyeball movement, proprioception

Question 5

trigeminal nerve 5

Answer 5

mixed
chewing
somatic sensations touch pressure pain and temperature of face and mouth

Question 6

abducens nerve 6

Answer 6

mixed (mainly motor)

eyeball movement

Question 7

facial nerve 7

Answer 7

mixed

facial expression, secretion of saliva and tears, taste from front of tongue

Question 8

vestibulocochlear nerve 8

Answer 8

sensory

hearing sense of equilibrium

Question 9

glossopharyngeal nerve 9

Answer 9

mixed
swallowing, secretion of saliva,
taste from back of tongue somatic sensation of oral cavity blood pressure monitoring

Question 10

Vagus nerve 10

Answer 10

mixed
efferent output for skeletal muscles of pharynx (throat) and larynx (voice box) and for smooth muscle and glands of thoracic and abdominal organs and for cardiac muscle of heart

Question 11

Accessory nerve 11

Answer 11

motor

efferent output for skeletal muscles of pharynx larynx neck and shoulder

Question 12

hypoglossal nerve 12

Answer 12

motor

tongue movement

Question 13

What are the three receptor types

Answer 13

chemoreceptors, thermoreceptors, mechanoreceptors

Question 14

chemoreceptors

Answer 14

taste - chemicals dissolved in saliva
smell - chemicals dissolved in mucus
pain - chemicals in extracellular fluid
blood oxygen - oxygen dissolved in plasma
blood PH free hdyrogen ions in plasma

Question 15

thermoreceptors

Answer 15

warm receptors - warmth increase in temp. between 30-43 celsius

Cold receptors - cold decrease in temp between 35-20 celsius

Question 16

mechanoreceptors (3)

Answer 16

baroreceptors
osmoreceptors
hair cells

Question 17

baroreceptor

Answer 17

mechanoreceptor for blood pressure - stretch of specific blood vessel walls

Question 18

osmoreceptors

Answer 18

osmolarity of extracellular fluid swelling stretch of receptor cells

Question 19

hair cells

Answer 19

sound - sound waves

balance and equilibrium - acceleration

Question 20

nociceptors

Answer 20

pain receptors

Question 21

tonic receptors

Answer 21

adapt only partially (stretch receptors in muscle)

Question 22

phasic receptors

Answer 22

adapt almost completely (touch receptors in skin)

Question 23

tactile receptors

Answer 23

touch hair receptor, merkel’s disk, pacinian corpuscle, ruffini ending, meissner’s corpuscle

Question 24

hair receptor

Answer 24

tactile receptor of hair movement and very gentle touch

Question 25

merkel’s disc

Answer 25

tactile receptor for light sustained touch

Question 26

pacinian corpuscle

Answer 26

tactile receptor for vibrations and deep pressure

Question 27

ruffini endings

Answer 27

tactile receptor for deep pressure

Question 28

meissner’s corpuscle

Answer 28

tactile receptor for light fluttering touch