special senses

Question 1

tarsal plate

Answer 1

mass of collagen and elastic fibers

skeleton of upper eyelid

Question 2

cornea

Answer 2

covered by conjunctiva (epithelium tissue covered by tears to keep eye moist
anterior 1/6, fibrous coat
–ciliary body and iris (smooth muscle), pulpil

Question 3

sclera

Answer 3

posterior 5/6 of fibrous coat

Question 4

wall of eyeball middle layer

Answer 4

vascular coat deep in fibrous coat called choroid

Question 5

wall of eyeball third layer

Answer 5

nervous layer-inner retina-where light translated to electrical impulse by photo receptors
anterior part=pigments behind lens

Question 6

optic disk

Answer 6

makes start of optic nerve, no photoreceptors

Question 7

ciliary body

Answer 7

when it contracts, suspensory ligaments become lose and you can look at near objects (parasympathetic)
when it relaxes, you are looking at far away things (sympathetic control)

Question 8

what is the sphincter pupillae?

Answer 8

parasympathetically innervated circular sm layer that constricts pupil

Question 9

dilator pupillae

Answer 9

radial muscle fibers, sympathetic innervation

Question 10

what produces aqueous humor?

what is it?

Answer 10

ciliary body

posterior chamber filled–>flows to ant–>collected by small veins at corneal-scleral junction called canal of schlemm

Question 11

what is glaucoma?

Answer 11

buildup of pressure in chambers that causes hazy cornea and dilated scleral vessels

Question 12

lacrimal apparatus

Answer 12

produces tears to clean eyelid

tears collected in medial corner of eye in lacrimal canaliculi–>ducts–>lacrimal sac–>nasolacrimal duct–>nasal cavity

Question 13

where does the external ear end?

Answer 13

ends at tympanic membrane

Question 14

describe external ear parts

Answer 14

includes auricle-cartilage and external acoustic meatus

-w/ceruminous glad that produces earwax which disinfects the area

Question 15

middle ear

Answer 15

tympanic cavity

Question 16

how is sound passed from middle to inner ear?

Answer 16

3 ossicles
malleus, incus, shapes
connected by 2 windows to inner ear
oval window-covered by shapes
round window-covered by a mucosal membrane

Question 17

which structures help to reduce vibration of the bones noise?

Answer 17

tensor tympani and stapedius

Question 18

bony labarynth inner ear

Answer 18

3 semicircular canal, vestibule, and cochlea

Question 19

membranous inner ear

Answer 19

in bony labyrinth
filled with endo lymph fluid
3 semicircular ducts in semicircular canal 
utricle and saccule in bony vestible
cochlear duct in cochlea

Question 20

where are there cristae in the inner ear

Answer 20

ampulla (dilated part) at junction b/t semicircular duct and saccule

Question 21

where is CSF filtered to produce endolymph fluid?

Answer 21

@ endolymphatic sac that passes through the bone INTO the cranial cavity
-extension of utricle and saccule