Embryo 22

Question 1

Frontonasal
Maxillary
Mandibular
Location relative to _______

Answer 1

Rostral to stomodeum
Lateral to stomodeum
Caudal to stomodeum

Question 2

Facial features develop during

Answer 2

second month

Question 3

Eyes move in which way

Answer 3

medially

Question 4

Ears move which way

Answer 4

superiorly

Question 5

1st ossification center in skull

Answer 5

Ears

Question 6

ectodermal thickening in frontonasal prominence

Answer 6

Nasal placodes

Question 7

Future nostrils

Answer 7

Nasal pit

Question 8

Nasal pits are part of which pharyngeal arch

Answer 8

1st

Question 9

Oronasal membrane ruptures at

Answer 9

week 6

Question 10

Oronasal membrane rupture gives

Answer 10

Primordia choanae

Question 11

Definitive chonae established by

Answer 11

development of secondary palate

Question 12

Olfactory epithelium is derived from

Answer 12

Neuroectoderm

Question 13

Cleft between lateral nasal prominences and maxillary prominences

Answer 13

Nasolacrimal groove

Question 14

Intermaxillary segment components

Answer 14

philtrum
Premaxillary part of paxilla
Primary palate

Question 15

Lateral palatine processes

Answer 15

Two plates of mesenchyme form secondary palate

Question 16

Hard palate made from

Answer 16

Primary palate

anterior secondary palate

Question 17

Cleft palate caused by

Answer 17

failure of medial nasal prominences to fuse with maxillary prominences

Question 18

Ear progression

Answer 18

Otic placode
Otic pit
Otic vesicles
membranous labyrinth

Question 19

Utricular region
Position
Contents

Answer 19

Dorsal: utricle, semicircular ducts

Question 20

Saccular region
Position
Contents

Answer 20

Ventral: saccule, cochlear ducts

Question 21

Diverticulum extends from otic vesicles to form the

Answer 21

endolymphatic duct and sac

Question 22

CNVIII migrates along coils of cochlear to form

Answer 22

spiral ganglion

Question 23

Cells in wall of coiled duct form

Answer 23

Spiral organ of Corti

Question 24

Vacules develop in cartilage surrounding cochlear duct

Unite to form

Answer 24

Perilymphatic space

Question 25

Perilymphatic space divisions

Answer 25

Scala vestibuli | Scala tympani

Question 26

Perilymphatic space filled with

Answer 26

perilymph

Question 27

Auricular hillockes Type of cells which arch

Answer 27

mesenchyal proliferations | 1st pharyngeal groove (1st and 2nd arches)

Question 28

Progression of optic

Answer 28

Optic groove Optic vesicles optic cups optic stalks

Question 29

Lens development

Answer 29

lens placode lens pit lens vesicle

Question 30

Artery inside the eye

Answer 30

hyaloid artery

Question 31

Cornea layers

Answer 31

Outer ectoderm | middle and inner mesenchyme (from neural crest)

Question 32

Cornea is induced by

Answer 32

lens

Question 33

Eyelids are from

Answer 33

mesenchyme (neural crest)