MOST FREQUENTLY ASK EMBRYOLOGY QUESTION WITH ANSWER 2015
MOST FREQUENTLY ASK EMBRYOLOGY QUESTION WITH ANSWER 2015
Q.The nasolacrimal groove separates the ?
A. mandibular and maxillary swellings
B. lateral nasal swelling and maxillary swelling
C. medial nasal swelling and maxillary swelling
D. first and second branchial arches
E. otic and optic vesicles
ANS B
The nasolacrimal groove lies between the maxillary swelling or prominence and the lateral nasal swelling. This groove ultimately forms the nasolacrimal duct and lacrimal sac. In the adult, it is the passage used by tears to travel from the eye to inferior meatus of the nasal cavity, to make your nose run when you cry.
Q.Many facial malformations are believed to be due to ?
A. a failure of the oral membrane to rupture
B. a failure to neural crest cells to migrate into the facial processes
C. a failure in growth of the head fold
D. an abnormal persistence of the pharyngeal clefts
E. none of the above
ANS B
Proper migration of neural crest cells into the face area is vitally important to facial development. Neural crest tissue will form much of the facial skeleton
Q.The foramen cecum of the adult tongue ?
A. marks the point of embryonic evagination of the thymus
