Pharyngeal Apparatus

PHARYNGEAL APPARATUS

Q. 1

Pierre Robin sequence is caused by defect in development of which pharyngeal arch?

 A

I

 B

II

 C

IV

 D

None of the above

Q. 1

Pierre Robin sequence is caused by defect in development of which pharyngeal arch?

 A

I

 B

II

 C

IV

 D

None of the above

Ans. A

Explanation:

Robin sequence may occur independently or in association with other syndromes and malformations. Like Treacher Collins syndrome, Robin sequence alters first-arch structures, with development of the mandible most severely affected. Infants usually have a triad of micrognathia, cleft palate, and glossoptosis (posteriorly placed tongue)
 

Q. 2

Where the endoderm and ectoderm approach each other in the head & neck region during the 4th week

 A

Pharyngeal Grooves

 B

Pharyngeal pouch

 C

Pharyngeal membrane

 D

Pharyngeal arch

Q. 2

Where the endoderm and ectoderm approach each other in the head & neck region during the 4th week

 A

Pharyngeal Grooves

 B

Pharyngeal pouch

 C

Pharyngeal membrane

 D

Pharyngeal arch

Ans. C

Explanation:

C i.e. Pharyngeal membrane



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