Chapter 4 Midterm Questions Flashcards
Palatal development occurs in how many weeks?
7-9 weeks
True or False
When the palatine shelves contact the tongue, they grow downward on either side of the tongue
True
As the palatine shelves grow medially, they contact the tongue, which grew upward into the nasal cavity during the _______ week?
7th week
What is the palatal elevation process?
process during the 8th prenatal week by which the posterior shelves push together, forcing the tongue forward and down, causing the palatal shelves to slide over the tongue
What are the three parts of the tissues of the tongue?
central tuberculum impar, two lateral lingual swellings
Posterior to the terminal sulcus, the base of the tongue forms the ___ ______
lingual tonsil (on the dorsal surface)
What is the name of the ring of tonsils where the lingual tonsil forms?
Waldeyer tonsillar ring (in the pharynx along with the palatine and pharyngeal tonsils)
The thyroid gland develops as an epithelial proliferation from the _____ _______
foramen cecum
Cells arise and migrate ventrally in the throat, thus creating the _____ ________
thyroid gland
True or False
By the 7th week, the thyroid descends to the front of the trachea.
True
True or False
Cleft lip is the most common facial malformation
True (genetic factors play role, shown by differences between racial groups)
What is the incidence of cleft lip in the white population?
1 in every 700 births
True or False
In Asian population, having one child born with a cleft palate have a 1 in 25 chance of having a second child with the defect
True
True or False
An incomplete cleft lip ranges in size from a notch to a deep groove in the upper lip but does not involve an opening of the nostril into the oral cavity
True
