Block 2

Question 1

Pharangeal arches develop in the ___ week

Answer 1

4th

Question 2

Neural Crest cells form from the developing ______

Answer 2

Neural Plate

Question 3

In the creation of the arches Neural Crest Cells migrate from posterior/dorsal neural tube region to the _____.

Answer 3

anterior/ventral

Question 4

Rapid proliferating _____ begin to form prominences.

Answer 4

mesenchyme

Question 5

The stomatodeum forms in the embryo, laying _____ throughout the oral cavity

Answer 5

Ectoderm

Question 6

Stomodaeum and primitive pharynx are separated by the ______ membrane.

Answer 6

buccopharyngeal

Question 7

Buccopharyngeal membrane ruptures opening the ____.

Answer 7

oropharynx

Question 8

Which germ layer are clefts derived from?

Answer 8

External ectoderm

Question 9

Which germ layer are pouches derived from?

Answer 9

Endoderm

Question 10

Cleft 1

Answer 10

External Auditory Meatus

Question 11

Clefts 2-4

Answer 11

Cervical Sinus that normally resorb

Question 12

True or False

Cervical cysts form in the medial area of the neck

Answer 12

False

They form laterally

Question 13

Pouch 1

Answer 13

Pharyngotympanic Tube

Question 14

Pouch 2

Answer 14

Palatine Tonsil

Question 15

Pouch 3

Answer 15

Inferior Parathyroid Gland & Thymus

Question 16

Pouch 4

Answer 16

Superior Parathyroid Gland & Ultimo branchial body

Question 17

What does the Ulimo Branchial body do?

Answer 17

Joins the thyroid and forms Follicular C Cells that produce Calcitonin

Question 18

Fill in the blanks regarding the formation and migration of the thyroid:
It forms at the midline of the pharynx just below the ____.
Thyroid migrates from the _______ to below the Cricoid.
Migration forms the _______ Duct.

Answer 18

Tuberculum impar

foramen cecum

Thyroglossal

Question 19

What type of cysts can result from thyroid migration?

Where are they located on the neck?

Answer 19

Thyrogloassal duct cysts

Midline