Anatomy QQ #3

Embryology is not a student favorite, so we don't expect you to love this one. But, let this be a reminder that maybe you need to do a quick review of it before Step 1.

1. What drug did your mom take during pregnancy if you have flipper arms?


DES

Cocaine

Thalidomide

13-cis-retinoic acid




2. Which of the following pertaining to heart embryology is matched correctly?


Truncus arteriosus gives rise to the Ascending Aorta and pulmonary trunk

Bulbus cordis gives rise to the trabeculated parts of the R and L ventricle

Right horn of sinus venosus gives rise to the coronary sinus

Right Common and Posterior cardinal veins give rise to the Superior Vena Cava




3. During weeks 6 to 30 fetal erythropoiesis occurs where?


Yolk sac

Liver

Spleen

Bone Marrow




4. The third aortic arch derivative forms what?


Stapedial and hyoid artery

common carotid

right subclavian artery

ductus arteriosus




5. Branchial arch 3 derivatives include what cartilage?


greater horn of hyoid

cricoid

lesser horn of hyoid

stapes




6. All of the following Branchial arches are correctly paired with their innervation EXCEPT:


Arch 1 - V2 and V3

Arch 2 - VII

Arch 3 - IX

Arch 6 - VIII




7. Which of the following statements is incorrect?


The 1st branchial cleft develops into the external auditory meatus

Persistent cervical sinus can lead to a branchial cyst in the thorax

The 2nd through 4th clefts form temproary cervical sinuses

Temporary cervical sinuses from the 2nd through 4th clefts are obliterated by 2nd arch mesenchyme




8. Which branchial arch forms the anterior 2/3 of the tongue?


1st

2nd

3rd

4th




9. What does the ventral wings of the 3rd branchial pouch develop into?


palatine tonsil

mastoid air cells

thymus

superior parathyroids




10. Where are Epithelial reticular cells containing Hassall's corpuscles found?


skin

thymus medulla

thyroid cortex

parathyroid glands