Oral and Craniofacial Development 2

Question 1

what does the primary palate form from

Answer 1

intermaxillary segment

Question 2

what do the palatal shelves form from

Answer 2

maxillary process

Question 3

fusion of palatal shelves form the:

Answer 3

secondary palate

Question 4

primary palate fuses with:

Answer 4

secondary palate

Question 5

what else is forming at the same time of the palate

Answer 5

nasal cavity

Question 6

areas of specialized thickened ectoderm develop at the surface of the embryo to form what

Answer 6

placodes

Question 7

the tissue around the nasal placodes undergoes growth, and the placodes become submerged, forming depressions called what

Answer 7

nasal pits

Question 8

each nasal pit invaginates and expands to form a what

Answer 8

nasal sac

Question 9

each developing nasal cavity is initially separated from the oral cavity by the primary palate and a piece of tissue called the what

Answer 9

oronasal membrane

Question 10

rupture of the _______________ opens up and the developing nasal cavities to the developing oral cavity

Answer 10

oronasal membrane

Question 11

what occupies the developing nasal cavity

Answer 11

tongue

Question 12

after rupture of the oronasal membrane, the developing tongue occupies the what

Answer 12

primitive nasal and oral cavities

Question 13

the oral and nasal cavities become separated by the what

Answer 13

palate

Question 14

while the palate is fusing, what else is also developing

Answer 14

nasal septum

Question 15

the nasal septum grows down from the ___________ and fuses with the palate

Answer 15

roof of the nasal cavity

Question 16

the nasal septum divides the nasal cavity into what

Answer 16

right and left sides

Question 17

the mandible and maxilla are derived from neural crest cells from the ______________

Answer 17

first branchial arch

Question 18

begins during the embryonic period and continues through childhood and adolescence

Answer 18

ossification

Question 19

the jaw develops mostly by what

Answer 19

intramembranous ossification

Question 20

bone tissue replaces a hyaline cartilage template of the bone-to-be

Answer 20

endochondral ossification

Question 21

bone forms within mesenchyme without replacing a cartilage template

Answer 21

intramembranous ossification

Question 22

the mandible develops from the _____________ of the first branchial arch

Answer 22

mandibular process

Question 23

what is bone formation associated with

Answer 23

meckel’s cartilage
inferior alveolar nerve
developing teeth
muscles of mastication

Question 24

formed by neural crest cells in branchial arch 1

Answer 24

meckel’s cartilage

Question 25

branches of ________ grow right next to meckel’s cartilage

Answer 25

CN V3

Question 26

what does CN V3 divide into between the posterior 1/3 and the anterior 2/3 of meckel’s cartilage

Answer 26

lingual branch and inferior alveolar branch

Question 27

anteriorly, the inferior alveolar branch divides into what

Answer 27

mental branch and incisive branch

Question 28

formation of the __________ occurs lateral to meckel’s cartilage

Answer 28

mandible

Question 29

starts within each mandibular process near the split of the inferior alveolar nerve into the mental and incisive branches

Answer 29

ossification

Question 30

bone will develop lateral to and around meckel’s cartilage _____________

Answer 30

anteroposteriorly

Question 31

the ________ eventually encloses the meckel’s cartilage and most of the cartilage degenerates

Answer 31

bone

Question 32

the bone will also eventually enclose the ___________ and most of the ____________

Answer 32

incisive nerve
inferior alveolar nerve

Question 33

the pattern of ossification produces the _____________ through which the mental nerve passes

Answer 33

mental foramen

Question 34

the bilateral centers of ossification will remain separated until they fuse at the ____________ until shortly after birth

Answer 34

mandibular symphysis

Question 35

ossification will continue posteriorly until it reaches the point where the CN V3 branches into _________ and ______________ nerves. here the _______ will form

Answer 35

lingual and inferior alveolar nerves
ramus

Question 36

secondary centers of ossification contribute to the formation of all parts of the __________

Answer 36

mandible

Question 37

most of meckel’s cartilage will degenerate but the posterior part will remain to form the ________ and _______ of the inner ear

Answer 37

incus and malleus

Question 38

the maxilla develops from the _____________ of the first branchial arch

Answer 38

maxillary process

Question 39

bone formation is associated with what

Answer 39

infraorbital nerve
developing teeth
nasal septal cartilage

Question 40

ossification begins at the termination of the __________ superior to the area where the primary maxillary canines will develop

Answer 40

infraorbital nerves

Question 41

ossification then spreads from these primary centers, and merges with ______________ of ossification that arise in different parts of the bone-to-be

Answer 41

secondary centers

Question 42

each ___________ starts as a groove on the nasal aspect and does not fully develop until after birth

Answer 42

maxillary sinus