Exam 4

Question 1

What does the utricle provide information about?

Answer 1

Horizontal acceleration

Question 2

What do your utricle and saccule provide information about?

Answer 2

Linear acceleration

Question 3

How is the utricle oriented?

Answer 3

Parallel to the base of the skull

Question 4

What does your saccule provide information about?

Answer 4

Vertical acceleration

Question 5

How is the saccule oriented?

Answer 5

Perpendicular to the base of the skull

Question 6

The maculae of the saccule and utricle consist of hair cells with what 2 things?

Answer 6

Stereocilia

Supporting cells

Question 7

Where are the stereocilia embedded?

Answer 7

Otolithic membrane

Question 8

What is the otolithic membrane?

Answer 8

Gelatinous mass containing otoliths

Question 9

What is the function of otoliths?

Answer 9

Increase the mass of the membrane

Question 10

What are otoliths? What are they made of?

Answer 10

Crystals of protein and calcium carbonate

Question 11

True or false: otolithic membrane will pull on the stereocilia when it moves

Answer 11

TRUE

Question 12

Where are the bodies of the hair cells in the ear located?

Answer 12

Macula

Question 13

Which stereocilia is the tallest?

Answer 13

Kereo ???

Question 14

When the hair cells are resting, what position are they in?

Answer 14

Standing upright

Question 15

What kind of information are you getting from the semicircular canal?

Answer 15

Rotational/angular acceleration

Question 16

Do you have otoliths in the semicircular canal?

Answer 16

No- just saccule and utricle

Question 17

How does alcohol affect your semicircular canals?

Answer 17

Thins endolymph (affects viscosity), so you overcompensate for your movements because you are perceiving things differently

Question 18

What is the region where your tears collect before they go into the lacrimal punctum?

Answer 18

Lacrimal caruncle and lacrimal lake

Question 19

Where is the lacrimal punctum located?

Answer 19

On inferior lacrimal papilla

Question 20

What is the white part of the eye called?

Answer 20

Sclera

Question 21

What is the sclera continuous with?

Answer 21

Cornea

Question 22

What is the colored part of the eye called?

Answer 22

Iris

Question 23

What is the aperture within the iris called?

Answer 23

Pupil

Question 24

You can change the size of the pupil with what?

Answer 24

Using the muscles in the iris

Question 25

Where are tears produced?

Answer 25

Lacrimal gland

Question 26

Where is the lacrimal gland located?

Answer 26

In the orbit superior and lateral to the eyeball

Question 27

How do tears exit the lacrimal gland?

Answer 27

Lacrimal ducts

Question 28

How do we get tears to cross over the surface of the eye? (from lateral to medial)

Answer 28

Blinking

Question 29

Where do the puncta lead into?

Answer 29

Lacrimal canaliculi

Question 30

Where do the lacrimal canaliculi lead into?

Answer 30

Lacrimal sac

Question 31

Where does the nasolacrimal duct go?

Answer 31

Inferior nasal meatus (inferior to inferior nasal conchae)

Question 32

How do tears enter the nasal cavity?

Answer 32

Nasolacrimal duct

Question 33

What are the functions of tears?

Answer 33

?? | Keep moisture in nasal cavity

Question 34

What are the ligaments of the eyelid?

Answer 34

Medial/lateral palpebral ligament

Question 35

Where does the medial palpebral ligament connect?

Answer 35

Superior and inferior tarsi to the medial margin of the orbit

Question 36

Where does the lateral palpebral ligament connect?

Answer 36

??

Question 37

Which muscle elevates the superior eyelid?

Answer 37

Levator palpebrae superioris muscle

Question 38

Where does the levator palpebrae superioris muscle attach?

Answer 38

Lesser wing of sphenoid | Superior tarsus and skin of superior eyelid

Question 39

What n inn levator palpebrae superioris muscle?

Answer 39

Oculomotor n

Question 40

What is the tarsus?

Answer 40

Dense band of connective tissue that forms the eyelid

Question 41

What do tarsal glands produce?

Answer 41

Lipids to lubricate edges of eyelid and prevent lacrimal fluid from spilling over eyelids