Oral Embryology Chapter 4

The frontal process develops into the _____.

• Cheeks
• Forehead
• Frontal arch
• Ear

The ear is formed by four auricular hillocks. The mandibular arch and the hyoid arch contribute to ear formation.

• True, True
• False, False
• True, False
• False, True

The maxillary processes form the ____.

• Cheeks
• Ears
• Mouth
• Nose

During which weeks does the palate form?

• Weeks 3-4
• Weeks 5-6
• Weeks 7-9
• Weeks 10-12

The thyroid develops from the ______.

• Foramen cecum at the junction of the base and body of the tongue
• Adenoids in the nasopharynx
• Nasal septum
• Lateral lingual swellings of the tongue

Failure of fusion of the medial nasal process and the maxillary process results in ______.

• Cleft lip
• Cleft palate
• Mandibular cleft
• Midline cleft of the lip

Cleft palate can occur without cleft lip.

• True
• False

Prior to palatal shelf elevation and closure, the anterior tongue is positioned:

• Below the palatal shelves
• Above the palatal shelves

Cleft palate is the most common facial malformation.

• True
• False

A cleft of the mandible occurs due to:

• Failure of fusion of the medial nasal processes
• Failure of the midline constriction of the 1st arch to disappear
• Failure of the frontal process to fuse with the mandible
• Failure of fusion of the maxillary processes with the mandibular process