Development of the Face and Palata

Question 1

When ande where does the facial primordia appear?

Answer 1

4th wk around large primordial stomodeum

Question 2

Neural Crest Cells migrate from _____ ___________ and _____ ___________ into the pharyngeal arches

Answer 2

lower mesencephalon and upper rhombencephalic region

Question 3

Craniofacial voluntary muscles are derived from _________ originating from ______ and _____ mesoderm

Answer 3

myoblasts, paraxial, prechordal

Question 4

When have the principal prominences of the face fomed?

Answer 4

by the en of 4th wk

Question 5

name the 3 pricipal prominences and what are they derived from

Answer 5

Frontonasal: derived from mesenchyme ventral to brain vesicles

maxillary: neural crest mesenchyme 1st pharyngeal arch
mandibular: neural crest mesenchyme 1 arch

Question 6

Nasal Placodes arise from _______ thickenings on both sides of the _______ promincence

Answer 6

ectodermal, frontonasal

Question 7

When do nasal placodes form nasal pits?

Answer 7

5th wk

Question 8

When are the nasal prominences separated from the maxillary prominence?

Answer 8

6th wk

Question 9

What do the lateral nasal prominences form?

Answer 9

alae of the nose

Question 10

the upper lip is derived from

Answer 10

medial nasal prominences

Question 11

nasal septum is derived from

Answer 11

a own growth from internal parts of the merger mdial nasal prominecnes

Question 12

The lateral nasal prminences are separated from maxllary promincences by the ________ _____

Answer 12

nasolacrimal groove

Question 13

nasolacrimal duct is derived from

Answer 13

extoderm in the floor of the nasolacrimal groove

Question 14

cheeks and maxillae is derived from

Answer 14

maxillary prominences

Question 15

lacrimal sac is derived from

Answer 15

cranial end of the nasolacrimal duct

Question 16

pIntermaxillary Segment gives rise to: (3)

Answer 16

philtrum of upper lip, median part of maxillary bone and 4 incisor teeth, and triangular primary palate

Question 17

hard and soft palat primordium is..

Answer 17

2ary palate

Question 18

what is the boundary between the 1ary and 2ary palate

Answer 18

incisive foramen

Question 19

what is the primordium of the lip and gum

Answer 19

labiogingival lamina

Question 20

what event communicates the nasal and oral cavities?

Answer 20

the rupture of the oronasal membrane

Question 21

5 nasal prominences give rise to the

Answer 21

nose

Question 22

the mandibular prominences form…

Answer 22

lower lip and jaw

Question 23

furrow between lateral nasal and maxillary processes that will later be covered over toform part of the nasolacrimal duct

Answer 23

naso-optic groove

Question 24

the naso-optic groove forms…

Answer 24

the nasolacrimal duct

Question 25

True or False: Lateral Nasal Prominence participate in the formation of the upper lip

Answer 25

False

Question 26

the intermaxillary segment ives rise too.. (3)

Answer 26

primary palate, philtrum of lip and maxillary 4 incisor teeth

Question 27

the external acoustic meatus is derived from...what week?

Answer 27

1st pharyngeal groove, end of 5th wk

Question 28

When does the eternal acoustic meatus ascend to the side of the head?

Answer 28

10-14wks

Question 29

When does palatogenesis occur

Answer 29

at the end of the 5th wk - 9th wk

Question 30

the nasal septum is formed by

Answer 30

medial nasal prominence

Question 31

Anterior cleft palate cause

Answer 31

palatine shelves fail to fuse with the primary plate

Question 32

Posterior cleft palate cause

Answer 32

palatine shelves fail to fuse with each other and with nasal septum

Question 33

Median cleft palate cause

Answer 33

incomplete merging of the two medial nasal prominences on the midline

Question 34

Oblique cleft palate cause

Answer 34

maxillary prominence fails to merge with the lateral nasal prominence

Question 35

when are olfactory nerves formed?

Answer 35

week 7