ORalHisto Quiz3

Question 1

when does the face and other tissues start to form

Answer 1

4th week (embryonic period)

Question 2

facial development includes the formations of:

Answer 2

primitive mouth (stomodeum)
mandibular arch
maxillary process
frontonasal process
nose

Question 3

what week is fetal period

Answer 3

4-12th week

Question 4

the first event in the development of the face (4th week prenatal)

Answer 4

disintegration of the membrane

Question 5

what week does the primitive mouth increase in depth and enlarges

Answer 5

4th week

Question 6

most facial structures develops through

Answer 6

fusion

Question 7

initially located between these adjacent swellings due to proliferation, differentiation and morphogenesis

Answer 7

cleft/furrow

Question 8

where is growth initially most rapid

Answer 8

upper face (to keep up with the development of the brain)

Question 9

forehead ceases to grow at what age

Answer 9

12

Question 10

the stomodeum is limited in depth by the?

Answer 10

oropharyngeal membrane

Question 11

what is the temporary structure that separates the stomodeum from the primitive pharynx

Answer 11

oropharyngeal membrane

Question 12

stacked bilateral swellings of tissue inferior to the stomodeum

Answer 12

pharyngeal arches

Question 13

how many pairs of pharyngeal arches

Answer 13

6

Question 14

the pharyngeal arches is covered by?

Answer 14

ectoderm

Question 15

the pharyngeal arches is lined by?

Answer 15

endoderm

Question 16

what does the pharyngeal arches support

Answer 16

primitive pharynx

Question 17

the primitive pharynx is cranial most part of the?

Answer 17

foregut

Question 18

the primitive pharynx is caudal to the?

Answer 18

stomodeum

Question 19

what separates the primitive pharynx from the stomodeum

Answer 19

buccopharyngeal membrane

Question 20

series of mesodermal thickenings appear on the lateral wall

Answer 20

buccopharyngeal membrane

Question 21

2 bulges of tissue that appear inferior to the primitive mouth

Answer 21

mandibular process

Question 22

the mandibular process consists of:

Answer 22

mesenchyme (neural crest cells)

Question 23

the future mandible is formed from?

Answer 23

mandibular processes that fuse to form the mandibular arch

Question 24

seen at the midline surface of mature bony mandible

Answer 24

mandibular symphysis

Question 25

this indicates where the mandible is formed by fusion of right and left mandibular processes

Answer 25

mandibular symphysis

Question 26

the mandibular arch is also considered as?

Answer 26

1st branchial arch

Question 27

forms within each side of the arch

Answer 27

Meckel's cartilage

Question 28

what is it called when most of the cartilage disappears as the mandible is formed

Answer 28

intramembranous ossification

Question 29

the mandibular arch gives rise to?

Answer 29

lower face (including lower lip) mandibular teeth muscles of mastication tongue

Question 30

bulge of tissue in the upper facial area

Answer 30

frontonasal process

Question 31

this process is at the most cephalic end of the embryo

Answer 31

frontonasal process

Question 32

the cranial boundary of the stomodeum

Answer 32

frontonasal process

Question 33

the frontonasal process gives rise to?

Answer 33

upper face forehead nose bridge primary palate nasal septum medial nasal process

Question 34

rounded areas of specialized, thickened ectoderm found at the location of the developing special sense organs

Answer 34

placodes

Question 35

placodes that are located anterior of the frontonasal process

Answer 35

nasal placodes

Question 36

button-like that later develop into olfactory epithelium

Answer 36

nasal placodes

Question 37

initially located fishlike on each side of the frontonasal process

Answer 37

lens placodes

Question 38

when placodes submerge, they form a depression in the center of each placode and becomes?

Answer 38

nasal pit (future nasal cavity)

Question 39

2 crescent-shaped swellings located between the nasal pits

Answer 39

median nasal process

Question 40

when the median nasal processes fuse together externally, it forms the?

Answer 40

root to apex of the nose tubercle of the upper lip philtrum

Question 41

what does the 2 medial nasal processes form when they fuse internally

Answer 41

intermaxillary segment

Question 42

involved in the formation of maxillary incisors, primary palate, and nasal septum

Answer 42

intermaxillary segment

Question 43

outer part of the nasal pits

Answer 43

lateral nasal processes

Question 44

the lateral nasal processes forms the?

Answer 44

ala of the nose

Question 45

adjacent swellings on each side of the stomodeum following the increased growth of the mandibular arch

Answer 45

maxillary processes

Question 46

true or false: most processes are formed from mesenchyme provided by the neural crest cells

Answer 46

true

Question 47

this process will form the midface, sides of upper lip, cheeks, secondary palate, posterior part of the maxilla, canine, posterior teeth, and associated tissue

Answer 47

maxillary processes

Question 48

fusion of both maxillary processes externally

Answer 48

upper lip

Question 49

the part where upper lip and lower lip meet

Answer 49

labial commissure