devolpment of ear

Question 1

Inner ear origin

Answer 1

ectodermal

Question 2

middle ear origin

Answer 2

endodermal

Question 3

auditory ossicles

Answer 3

neural crest cells

Question 4

outer ear

Answer 4

ectodermal origin

Question 5

devolpment of otic placode is induced by

Answer 5

Notochord
paraxial mesooderm
rhombencephalon

Question 6

otic vesicle will divide into 2 which structure at DAY 36

Answer 6

Ventral and dorsal

Question 7

ventral will give off

Answer 7

sacculus and cochlear duct

Question 8

dorsal will give off

Answer 8

utriculus & endolymphatic duct

Question 9

Tall columnar cellls will give rise to

Answer 9

Organ of corti

Question 10

how will semicircular canal formed ?

Answer 10

dissaperarnce of central part of utricle will five SMC

Question 11

Typmanic cavity will formed by

Answer 11

lateral 1 pharyngeal pouch

Question 12

auditory tube / pharyngotymapnic tube or eustachian tube will be formed by

Answer 12

medial part of 1 pharyngeal pouch

Question 13

malleus & incus ossicle & , meckels cartilage will devolp from

Answer 13

1st pharyngeal arch cartilage

Question 14

stapedius ossicle will devolp from

Answer 14

2nd pharyngeal arch cartilage

Question 15

stapedius muscle

Answer 15

2nd pharyngeal arch

Question 16

tensor tympani muscle develops from

Answer 16

1st pharyngeal arch

Question 17

external acoustic meatus develops form

Answer 17

epithlium of 1st pharyngeal groove

Question 18

tympanic membrane

Answer 18

ectodermal epithelium of 1st pharyngeal groove
endodermal epithelium of 1st pharyngeal pouch

Question 19

tubular outgrowth of sacculae will form

Answer 19

cochlear duct