Devo Review Block B

Question 1

microstomia-

Answer 1

no lower jaw or tongue, tiny mouth. caused by excessive merging of mesenchyme in maxillary mandibular prominences

Question 2

prosencephalon develops into ______ and _____

Answer 2

telencephalon and diencephalon

Question 3

rhombencephalon develops into _____ and ______

Answer 3

metencephalon and myelencephalon

Question 4

telencephalon derivative

Answer 4

cerebral hemispheres

Question 5

diencephalon derivative

Answer 5

thalamus and hypothalamus

Question 6

mesencephalon derivative

Answer 6

midbrain

Question 7

metencephalon derivative

Answer 7

pons and cerebellum

Question 8

myelencephalon derivative

Answer 8

medulla

Question 9

cervical flexure-

Answer 9

level where medulla is continuous with the spinal cord

Question 10

midbrain flexure-

Answer 10

between mesencephalon and prosencephalon

Question 11

pontine flexure-

Answer 11

divides rhombencephalon into myelencephalon and metencephalon

Question 12

what flexure is responsible for opening up ventricular system?

Answer 12

pontine flexure

Question 13

what keeps the motor and sensory plates separate?

Answer 13

sulcus limitans

Question 14

smooth brain-

Answer 14

lissencephalic

Question 15

anencephaly results when

Answer 15

anterior neuropore fails to close

Question 16

_______ is where anterior neuropore was located developmentally

Answer 16

lamina terminalis

Question 17

microcephaly-

Answer 17

small cranial vault

Question 18

obstructive hydrocephalus in infants can be caused by

Answer 18

congenital aqueductal stenosis

Question 19

skull base is formed via

Answer 19

endochondral bone formation

Question 20

neurocranium is formed via

Answer 20

intramembranous bone formation

Question 21

what fontanelles exist

Answer 21

anterior, posterior, mastoid, and sphenoid

Question 22

what suture may persist in front of skull

Answer 22

metopic suture

Question 23

premature fusion of sutures-

Answer 23

craniosynostosis

Question 24

syndromes associated with craniosynostosis

Answer 24

saethre-chotzen, crouzon, apert, pfeiffer

Question 25

fused saggital suture will result in

Answer 25

scaphocephaly

Question 26

fused metopic suture will result in

Answer 26

trigonocephaly

Question 27

unilateral fused coronal suture will result in

Answer 27

plagiocephaly

Question 28

bicoronal suture fusion will result in

Answer 28

turricephaly

Question 29

lamboid suture fusion will result in

Answer 29

plagiocephaly

Question 30

structures formed from 1st arch cartilage

Answer 30

malleus, incus, anterior ligament of malleus, and sphenomandibular ligament

Question 31

structures formed from 2nd arch cartilage

Answer 31

stapes, styloid process, stylohyoid ligament, lesser cornu/superior part of hyoid

Question 32

structures derived from 3rd arch cartilage

Answer 32

rest of the hyoid bone

Question 33

structures derived from 4th/6th arch cartilages

Answer 33

laryngeal cartilages (except for epiglottic)

Question 34

muscles derived from 2nd arch

Answer 34

stapedius, stylohyoid, posterior belly of diagastric, muscles of facial expression

Question 35

muscles derived from 4th/6th arches

Answer 35

cricothyroid, levator veli palatini, constrictors of pharynx, palatoglossus, intrinsic muscles of larynx

Question 36

derivatives of 1st pharyngeal pouch

Answer 36

tubotympanic recess, tympanic cavity, mastoid antrum, pharyngotympanic tube

Question 37

derivative of 2nd pharyngeal pouch

Answer 37

tonsillar fossa

Question 38

derivates of 3rd pharyngeal pouch

Answer 38

thymus and inferior parathyroid gland

Question 39

derivatives of 4th pharyngeal pouch

Answer 39

superior parathyroid gland and ultimopharyngeal body

Question 40

thyroid gland comes from

Answer 40

endodermal thickening on floor of pharynx (not from 2nd pouch)

Question 41

thyroid ________ begins to descend neck as the thyroglossal duct

Answer 41

diverticulum

Question 42

________ from median tongue bud is overgrown by _______

Answer 42

- medial lingual swelling | - lateral lingual swelling from distal tongue buds

Question 43

point of fusion of 2 distal tongue buds-

Answer 43

medial sulcus

Question 44

posterior 1/3 of tongue develops from

Answer 44

3rd pharyngeal arch

Question 45

what are circumvallate papillae innervated by

Answer 45

CN IX

Question 46

what gives rise to epiglottis?

Answer 46

rostral part of hypopharyngeal eminence

Question 47

what is the only laryngeal cartilage not formed by the fusion of the 4th and 6th arches

Answer 47

epiglottic cartilage

Question 48

type 1 and 2 cysts refer to

Answer 48

first branchial cleft cysts

Question 49

second branchial cleft cysts communicate with

Answer 49

region of 2nd pharyngeal pouch

Question 50

third branchial cleft cysts pierce the ______ and enters the _______.

Answer 50

thyrohyoid membrane and enter the larynx

Question 51

lateral nasal prominence becomes

Answer 51

alae of nose

Question 52

median nasal prominences fuse to form

Answer 52

intermaxillary segment

Question 53

maxillary prominences are separated from lateral nasal prominence by ________

Answer 53

nasolacrimal groove (which will form nasolacrimal duct)

Question 54

if maxillary prominence and lateral nasal prominence dont fuse right, ________ results

Answer 54

oblique nasal cleftq

Question 55

stomodeum-

Answer 55

opening of future oral cavity

Question 56

most critical period of development of the palate is from when to when?

Answer 56

end of 6th week to beginning of 9th week

Question 57

the eye has developmental contributions from what germ layers?

Answer 57

neural ectoderm, superficial ectoderm, and mesoderm

Question 58

evagination of the diencephalon

Answer 58

optic vesicle

Question 59

2 parts of pars caeca-

Answer 59

pars iridica and pars ciliaris

Question 60

mesoderm of eye gives rise to what 4 strucutes?

Answer 60

stroma, ciliary body, choroid and sclera

Question 61

what 2 things can be caused by maternal rubella?

Answer 61

congenital glaucoma and congenital cataract

Question 62

failure of optic vesicles to form

Answer 62

anopthalmia

Question 63

congenital absence of lens

Answer 63

aphakia

Question 64

failure of eyelids to form

Answer 64

cryptopthalmos

Question 65

the tubotympanic recess from the 1st pouch gives rise to

Answer 65

tympanic cavity, pharyngotympanic tube, and mastoid antrum

Question 66

what cartilages give rise to the middle ear bones and muscles?

Answer 66

meckel's and reichart's

Question 67

what eye structures are generated from both mesoderm and superficial ectoderm?

Answer 67

eyelids and cornea`

Question 68

the pigmented layer of the retina stimulates the development of what 2 things

Answer 68

choroid and sclera

Question 69

the photosensitive retina stimulates the _____ to become the _____

Answer 69

lens vesicle to become the lens

Question 70

the optic vesicle stimulates the _____ to become the _____

Answer 70

lens ectoderm to become the lens placode

Question 71

the lens vesicle stimulates the generation of

Answer 71

corneal epithelium

Question 72

endoderm from the first pharyngeal pouch will develop into ____

Answer 72

tubotympanic recess

Question 73

tubotympanic recess will develop into ____ and ______

Answer 73

tympanic cavity (which gives rise to mastoid) and pharyngotympanic tube

Question 74

the mesoderm of the inner ear gives rise to (5)

Answer 74

semicircular canals, perilymphatic space, scala vestibuli, scala tympani, and cochlea

Question 75

the mesoderm of the middle ear gives rise to (5)

Answer 75

malleus, incus, tensor tympani, stapes, stapedius m.

Question 76

the ectoderm of the inner ear gives rise to the otic pit--> otic vesicle---> 3 things:

Answer 76

endolymphatic duct (becomes endolymphatic sac), utricule and saccule

Question 77

utricle gives rise to-->

Answer 77

ampullae

Question 78

saccule gives rise to-->

Answer 78

cochlear duct