Eye and ear development

Question 1

Optic stalk connects the _____ _____ to forebrain

Answer 1

optic cup

Question 2

choroid fissure allows passage of

Answer 2

hyaloid vessels

Question 3

Outer layer of optic cup becomes

Answer 3

retinal pigment epithelium, outer pigment layer of ciliary epithelium, outer pigmented layer of iris

Question 4

Inner layer if optic cup develops into neural layers:

Answer 4

pars optica retina and pars ceca retina

Question 5

Pars ceca retina 2 parts

Answer 5

pars ciliaris retinae and pars iridica retinae

Question 6

Optic cup induces formation of ____ ______ from surface ectoderm

Answer 6

lens placode

Question 7

Lens placode forms

Answer 7

lens vesicles

Question 8

Posterior cells elongate and form

Answer 8

lens fibers

Question 9

continuations of choroid and sclera surround the optic nerve as the

Answer 9

optic arachnoid and dura mater

Question 10

Pax 6

Answer 10

critical for eye development

Question 11

without a lens placode

Answer 11

no optic cup invagination occurs

Question 12

colobomas are associated with mutations in

Answer 12

pax 6

Question 13

Otic placodes

Answer 13

develop as thickenings of surface ectoderm on rhombencephalon

Question 14

inner ridge of ear

Answer 14

future spiral limbus

Question 15

outer ridge of ear

Answer 15

forms one row of inner and three or four rows of outer hair cells (sensory cells of the auditory system)

Question 16

Tectorial membrane

Answer 16

rests on tip of hair cells

Question 17

organ of corti

Answer 17

hair cells + tectorial membrane

Question 18

semicircular canals develop from the ____ _____ of the otic vesicle

Answer 18

utricular portion