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A & P > special senses (eye, ear) > Flashcards

special senses (eye, ear) Flashcards

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20
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44
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55
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56
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57
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69
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O

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70
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71
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72
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R

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73
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S

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74
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describe the flow of aqueous humor

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75
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describe the macula lutea and what it is for

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76
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describe the visual pathway

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77
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A

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78
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91
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92
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95
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96
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97
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98
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99
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101
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102
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108
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109
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111
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112
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114
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115
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G

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117
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A

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118
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B

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119
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A

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120
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B

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121
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describe the mechanism of hearing

A
122
Q

Actions: superior rectus

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elevation, adduction and medial rotation of th eye

123
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Actions: lateral rectus

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abduction of the eye

124
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Actions: inferior rectus

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depression, adduction and lateral rotation of the eye

125
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Actions: medial rectus

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adduction

126
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Actions: superior oblique

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medial rotation, depression and abduction

127
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Actions: inferior oblique

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lateral rotation, elevation and abduction

128
Q

which extrinsic eye muscles are mediated by the CN occulomotor III

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superior rectus
inferior rectus
medial rectus
inferior oblique

129
Q

which extrinsic eye muscle is mediated by CN abducens VI

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lateral rectus

130
Q

which extrinsic eye muscle is mediated by CN trochlear IV

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superior oblique

131
Q

which skull foramen do the extrinsic eye muscle nerves emerge from

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superior orbital fissure

132
Q

what does the conjunctiva attach to

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cornea and bottom lid

133
Q

what does the lacrimal gland hold

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saline solution

134
Q

what does the superior palpabrae do

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move the upper eyelid

135
Q

what is conjunctiva and what is its purpose

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

136
Q

the section where the sclera becomes transparent is

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the cornea

137
Q

what is the white of the eye

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sclera

138
Q

which tunic holds photoreceptors

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retina

139
Q

describe the fovea centralis

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tiny pit, tons of cones, area of finest vision

140
Q

describe the macula latea

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lateral to optic disc, high concentration of cones

141
Q

what are cones good for compared to rods

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

142
Q

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

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choroid
iris
ciliary body

143
Q

what does choroid pigment do

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absorb excess light, vessels supply other tissues

144
Q

what does the iris do

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controls amount of incoming light

145
Q

ciliary body

A

attaches and focuses lens

146
Q

what happens whe ciliary muscles are relaxed

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suspensory ligament pulled tight–> flattens the lens

147
Q

what happens when ciliary muscles contract

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tension released from suspensory ligament- lens becomes more convex

148
Q

what is strabisumus

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orientation of two eyes does not match one another

149
Q

what is nystagmus

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neurological sign characterized by rapid uncontrolled eye movemement

150
Q

what is glaucoma

A

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

151
Q

what is cataracts

A

clouding of the lens

A & P (23 decks)

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