Dev. Of the Face

Question 1

There is mesoderm at the oropharyngeal membrane. True/ False

Answer 1

False, The oropahryngeal membrane is an in pocketing of the ectoderm meeting the endoderm, to form a two layered membrane , with no mesoderm

Question 2

From what are the mesenchyme of the head derived from

Answer 2

The Lateral plate mesoderm
Paraxial mesoderm
Neural crest and ectodermal placodes

Question 3

when does the dev. of the face begin

Answer 3

Week 4

Question 4

What is the stomodeum

Answer 4

The primitive mouth

Question 5

What is the Philtrum

Answer 5

THe middle part of the upper lip

Question 6

What embryological structure forms the alae of nose

Answer 6

Lateral nasal processes

Question 7

What is forms the labiogingival sulcus

Answer 7

The degenration of the labiogingival lamina

Question 8

hat is the name of the remnant of labiogingival lamina after degeneration

Answer 8

Labial Frenulum

Question 9

What causes choanal atresia

Answer 9

When the oronasal membrane fails to break down or breaks down partially

Question 10

What structure contributes the tissues for the formation of the primary palate

Answer 10

The Middle Nasal Prominence

Question 11

A newborn is diagnosed with a cleft lip affecting the primary palate. Which teeth are most likely affected, and what is the embryological cause of this condition?

Answer 11

The four maxillary incisors (two central and two lateral incisors) are most likely affected because they develop from the primary palate.

A cleft in this region occurs due to the failure of fusion between the medial nasal prominences and maxillary prominences during embryonic development

Question 12

What type of drug during pregnamcy can increase the risk of the formation of cleft lip and give an example

Answer 12

Anticonvulsants an example is phenobarbital

Question 13

What is the name of the first lingual Swelling, and which pharyngeal arch does it develop from

Answer 13

Tuberculum impar, pharyngeal arch 1

Question 14

What is the name of the second median swelling

Answer 14

Copula

Question 15

What does the third medial swellling form

Answer 15

Epiglottis

Question 16

What is the innervation of the anterior part of the tongue

Answer 16

Facial nerve supplies the anterior 2/3rd of the tongue( chorda tympani) for taste, and lingual nerve for general sensation

Question 17

What innervates the root of the tongue

Answer 17

root of the tongue supplied by vagus nerve