embryology lecture

Question 1

oroauricular facial dyosotosis

Answer 1

midface deficiences

Question 2

treacher collins

Answer 2

mandible hypoplasia and malformed ears

Question 3

warrdenberg

Answer 3

often 2 diff colored eyes, broad face, pigmentation problems

Question 4

pharyngeal arches

Answer 4

develop bi-laterally ventral to the neural tube

Question 5

each arch is a composite finger composed of

Answer 5

mesenchyme and mesoderm and neural crest, ectoderm and endoderm-inside and out

Question 6

1st arch

Answer 6

forms mandible, malleus, incus of middle ear, sphenomandibular ligament, muscles of mastication, CN V

Question 7

2nd arch

Answer 7

forms stapes, styloid process of temporal bone, superior portion of the hyoid bone, stylohyoid ligament, muscles of facial expression, CN VII, VIII

Question 8

3rd arch

Answer 8

inferior body of the hyoid bone, stylopharyngeus,, CN IX

Question 9

4th -6th arches

Answer 9

forms laryngeal cartilages- thyroid and cricoid cartilages, striated muscle of pharyngeal laryngeal and esophagus, CN X

Question 10

mouth forms from the

Answer 10

stomidium

Question 11

foramen cecum

Answer 11

transient structure linked to thyroid gland and thyroglossal duct

Question 12

T/F - epithemlium comes from the endoderm and ectoderm- independent on the inside of each arch and outside respectively

Answer 12

true

Question 13

structures inside the arch arise from

Answer 13

mesenchyme or neural crest

Question 14

neural crest comes from the

Answer 14

ectoderm

Question 15

neurons that arise from rhombomeres 1-3 contribute to

Answer 15

arch 1

Question 16

neurons that arise from rhombomeres 4-5 contribute to

Answer 16

arch 2

Question 17

T/F - 4th arch does not get a contribution from the rhombomeres

Answer 17

True

Question 18

paraxial mesoderm gives rise to

Answer 18

striated meuscles of the head and neck

Question 19

cleft lip derives from problems in the

Answer 19

neural crest

Question 20

ear canal froms from cleft ____

Answer 20

1

Question 21

cervical sinus

Answer 21

obliterated as clefts disappear

Question 22

pharyngeal pouches derive from the

Answer 22

endoderm

Question 23

2nd pharyngeal pouch gives rise to the

Answer 23

palatine tonsils

Question 24

3rd pharyngeal pouch gives rise to the

Answer 24

Inferior parathyroid glands, thymus,

Question 25

4th pharyngeal pouch gives rise to the

Answer 25

superior parathyroid glands, Ultimobranchial bodies

Question 26

Tongue Surface is composed of Arch #'s

Answer 26

1,3,4

Question 27

CN of ant. 2/3 of tongue

Answer 27

V, VII

Question 28

CN of post. 1/3 of tongue

Answer 28

IX+X, IX

Question 29

CN of tongue Musculature

Answer 29

XII

Question 30

of facial primordia

Answer 30

5

Question 31

what are Taratogens

Answer 31

Monster causers