DEVELOPMENT OF THE FACE AND PALATINE

Question 1

when does the development of the face occur

Answer 1

between 4th and 8th week

Question 2

during the 4th week, there are facial prominence

Answer 2

true

Question 3

frontonasal prominence

Answer 3

Frontonasal prominence – formed by the proliferation of mesenchymal neural crest cells ventral to the forebrain

Question 4

mandibular and maxillary prominences

Answer 4

Mandibular and maxillary prominences – parts of the 1st pharyngeal arch.
Space lies between the maxillary prominences, covered by the oropharyngeal membrane; this is known as the stomatodeum, the precursor to the mouth and pituitary gland

Question 5

nasal placode

Answer 5

depression of the ectoderm due to induction by the ventral portion of the brain

Question 6

on the 5th week

Answer 6

nasal pits are formed

Nasal development is instigated by the appearance of raised bumps called nasal placodes on both sides of the frontonasal prominence. These then invaginate to form nasal pits, with medial and lateral nasal prominences on either side.

Question 7

after nasal prominence are formed frontonasal prominence becomes

Answer 7

frontal process

Question 8

during the 7th week of development

Answer 8

maxillary prominence continues to grow/increase in size, compressing medial nasal prominence towards each other in the midline to form 1 median nasal prominence

Question 9

upper lip

Answer 9

2 maxillary prominence and median nasal prominence

Question 10

medial nasal prominence forms

Answer 10

1. Philtrum, primary palate, upper 4 incisors, and associated jaw,
2. bridge of the nose, median septum, columellar, frenulum inside the lip

Question 11

maxillary prominence form

Answer 11

cheeks and maxilla

Question 12

the nose is formed from 5 prominence

Answer 12

1. frontanasalis= bridge of the nose
2. Mp= crest and the tip of the nose
3. lateral nasal p= sides of the nose

Question 13

nasolacrimal groove separates

Answer 13

Mp and the lateral nasal prominence

Question 14

ectoderm in the nasolacrimal groove

Answer 14

will form epithelium cord of cells which will later form nasolacrimal duct and after this, Mp and LNP merges

Question 15

the upper part of the nasolacrimal duct will dilate to form

Answer 15

lacrimal sac which opens up to the inferior meatus of nasal

cavity

Question 16

Mp will form a triangular mass of mesenchyme behind the philtrum of the lip called

Answer 16

palatal process/primary palate

Question 17

Mp will give rise to two palatine shelf which is projected vertically on the side of the tongue and will later

Answer 17

elevate to lie horizontal to the tongue where they fuse

Question 18

as the palate shelf fuses, they will merge with the

Answer 18

the median palatine process to form the definitive palatine process

Question 19

fusion of the two palatal shelves is facilitated by

Answer 19

a sticky substance is known as glycocelics present on the epithelium of palatal shelves

Question 20

facial clefts

Answer 20

Cleft lip
Incomplete cleft lip
Unilateral cleft lip
Bilateral cleft lip
Cleft palate
Median cleft lip
Oblique facial clefts

Question 21

Frontonasal

Answer 21

Forehead, bridge of nose, medial and lateral nasal prominences

Question 22

Medial nasal

Answer 22

Philtrum, primary palate, upper 4 incisors, and associated jaw

Question 23

Lateral nasal

Answer 23

Sides of the nose

Question 24

Maxillary (1st pharyngeal arch)

Answer 24

Cheeks, lateral upper lip, secondary palate, lateral upper jaw

Question 25

Mandibular (1st pharyngeal arch)

Answer 25

Lower lip and jaw