special senses (eye, ear)

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A

Answer 1

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g

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Question 72

R

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Question 73

S

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Question 74

describe the flow of aqueous humor

Answer 74

Question 75

describe the macula lutea and what it is for

Answer 75

Question 76

describe the visual pathway

Answer 76

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Question 119

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Question 121

describe the mechanism of hearing

Answer 121

Question 122

Actions: superior rectus

Answer 122

elevation, adduction and medial rotation of th eye

Question 123

Actions: lateral rectus

Answer 123

abduction of the eye

Question 124

Actions: inferior rectus

Answer 124

depression, adduction and lateral rotation of the eye

Question 125

Actions: medial rectus

Answer 125

adduction

Question 126

Actions: superior oblique

Answer 126

medial rotation, depression and abduction

Question 127

Actions: inferior oblique

Answer 127

lateral rotation, elevation and abduction

Question 128

which extrinsic eye muscles are mediated by the CN occulomotor III

Answer 128

superior rectus
inferior rectus
medial rectus
inferior oblique

Question 129

which extrinsic eye muscle is mediated by CN abducens VI

Answer 129

lateral rectus

Question 130

which extrinsic eye muscle is mediated by CN trochlear IV

Answer 130

superior oblique

Question 131

which skull foramen do the extrinsic eye muscle nerves emerge from

Answer 131

superior orbital fissure

Question 132

what does the conjunctiva attach to

Answer 132

cornea and bottom lid

Question 133

what does the lacrimal gland hold

Answer 133

saline solution

Question 134

what does the superior palpabrae do

Answer 134

move the upper eyelid

Question 135

what is conjunctiva and what is its purpose

Answer 135

a mucous membrane lining the anterior surface of eyeball and inner lining of eyelids
it purpose: lubricant

Question 136

the section where the sclera becomes transparent is

Answer 136

the cornea

Question 137

what is the white of the eye

Answer 137

sclera

Question 138

which tunic holds photoreceptors

Answer 138

retina

Question 139

describe the fovea centralis

Answer 139

tiny pit, tons of cones, area of finest vision

Question 140

describe the macula latea

Answer 140

lateral to optic disc, high concentration of cones

Question 141

what are cones good for compared to rods

Answer 141

cones–> color/daylight
rods–> black and white/nighttime

Question 142

what does the vascular tunic (pigmented, vascular layer) contain

Answer 142

choroid
iris
ciliary body

Question 143

what does choroid pigment do

Answer 143

absorb excess light, vessels supply other tissues

Question 144

what does the iris do

Answer 144

controls amount of incoming light

Question 145

ciliary body

Answer 145

attaches and focuses lens

Question 146

what happens whe ciliary muscles are relaxed

Answer 146

suspensory ligament pulled tight–> flattens the lens

Question 147

what happens when ciliary muscles contract

Answer 147

tension released from suspensory ligament- lens becomes more convex

Question 148

what is strabisumus

Answer 148

orientation of two eyes does not match one another

Question 149

what is nystagmus

Answer 149

neurological sign characterized by rapid uncontrolled eye movemement

Question 150

what is glaucoma

Answer 150

aqueous humors are not drained quickly or at all, pressure on retina and optic nerve

Question 151

what is cataracts

Answer 151

clouding of the lens