lect 14- Eye and Ear Flashcards

1
Q

what are the 2 segments of the eye defined by

A

Anterior border of vitreous body

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2
Q

what forms the lens placode

A

epithelium over the optic vesicles thickening

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3
Q

what does the optic vesicle invaginate to form

A

optic cup

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4
Q

what connects the optic vesicle to the diencephalon

A

fissured optic stalk

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5
Q

what does the inner wall of the optic cup become

A

neural retina

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6
Q

what does the outer wall of the optic cup become

A

pigment epithelium

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7
Q

what is the initial blood supply to the optic cup

A

hyaloid artery

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8
Q

what is the site of retinal detachments even though it is lost in adults

A

intraretinal space

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9
Q

what are the 3 types of cones

A

red, green, blue

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10
Q

what cells of the retina develop first

A

ganglion cells

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11
Q

what connects the ciliary muscle to the lens

A

suspensory fibers

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12
Q

what is the condition in which there are missing pieces of structures of the eye

A

colobomas

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13
Q

what is the cause of colobomas

A

retinal/choroid fissure not closing

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14
Q

what condition occurs when the iris has a keyhole appearance

A

coloboma iridis

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15
Q

what disorder of the eye has a mutation in PAX2

A

renal coloboma syndrome

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16
Q

what is the embryonic tissue of the retina

A

outer and inner layer of optic cup

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17
Q

what is the embryonic tissue of the iris and ciliary body lining

A

outer and inner layer of optic cup

18
Q

what is the embryonic tissue of the iris and ciliary body (stroma), dilator and constrictor muscle

A

mesenchyme

19
Q

what is the embryonic tissue of the choroid

A

mesenchyme

20
Q

what is the embryonic tissue of the sclera

A

mesenchyme

21
Q

what is the embryonic tissue of the lens

A

surface ectoderm

22
Q

what is the embryonic tissue of the cornea (anterior epithelium)

A

surface ectoderm

23
Q

what is the embryonic tissue of the cornea (dense connective tissue and corneal endothelium)

A

mesenchyme

24
Q

what is the embryonic tissue of the vitreous body

A

mesenchyme

25
what is the embryonic tissue of the eyelid
surface ectoderm (folds) with core mesenchyme
26
what are the adult derivates of the utricle
sensory hair cells and otolith
27
what is the adult derivative of semicircular ducts
sensory hairs of cristae ampullaris
28
what does the cristae ampullaris detect
Angular acceleration
29
what is the adult derivative of the vestibular ganglia
CN VIII
30
what detects linear acceleration and gravity
saccule
31
what pharyngeal arches doe the external ear develop from
arch 1 and 2
32
what is the external ear innervated by
CN V3 and CN IX
33
what cartilage does the malleus and incus develop from
meckel's cartilage
34
what cartilage does the stapes develop from
reichert's cartilage
35
what is the embryonic precursor for bony labyrinth
mesenchyme surrounding membraneous labyrinth
36
what is the embryonic precursor for membraneous labyrinth
surface ectoderm
37
what is the embryonic precursor for the tympanic cavity
first pharyngeal arch
38
what is the precursor of the tympanic membrane
ectoderm of first pharyngeal cleft, endoderm of first pharyngeal pouch and intervening mesenchyme
39
what is the precursor for the external auditory meatus
first pharyngeal cleft
40
what is the precursor for the auricle (external ear)
first pharyngeal arch (anterior) and 2nd pharyngeal arch (posterior)