Chapter 3 Midterm Questions Flashcards
The second pharyngeal pouch becomes the?
palatine tonsils
The third pharyngeal pouch becomes the?
inferior parathyroids and thymus
The fourth pharyngeal pouch becomes the?
superior parathyroids
The fifth pharyngeal pouch becomes the?
ultimobranchial body
True or False
The endodermal lining of the pharyngeal pouches differentiates into several important organs
True
What kind of cells does the thymus produce?
t cells (destroy invading microbes and are important for the body’s immune system)
What does the ultimobranchial body fuse with?
thyroid
What type of cells does the ultimobranchial body contribute?
parafollicular cells to the thyroid
True or False
After the fifth week, no other pharyngeal grooves are seen externally as the tissues of the second and fifth arch grow over the other arches and grooves make contact with each other
True
Each of the five pharyngeal arches contains a right and a left?
aortic arch vessel (leads from heart through arches to face, brain, and posterior regions of body)
The medial pterygoid and masseter muscles attach as a sling at the angle of the _______
mandible
The temporal is muscle grows from the?
coronoid process (into the temporal fossa, and lateral pterygoid muscle)
The pterygoid muscle extends from the condyle anteriorly to the ____ ______
sphenoid bone (and pterygoid bone into temporal fossa)
True or False
Substantial evidence shows that the contact point of the malleus and incus is the articulation of the lower jaw for the first 20 weeks of prenatal life
True
The second temporomandibular joint, which is the articulation of the _________ and the ____ ______, becomes functional
condyle
temporal fossae
What is the rod-shaped cartilage of the second or hyoid arch called?
Reichert cartilage
The fourth arch contributes to the Hyloid which then supports the thyroid gland?
hyoid cartilage
thyroid gland
True or False
The fifth arch has no adult cartilage derivatives and the sixth arch cartilage forms the laryngeal cartilage
True
What are the several units that the mandible develops as?
condylar unit body angular process coronoid process alveolar process
What is the simple suture of the face?
uncomplicated band of tissue between bony fronts
What is a condylar unit of the mandible?
forms articulation, allowing movement of the mandible
What is the body unit of the mandible?
center of all growth and function
What is the angular process unit of the mandible?
responds to the lateral pterygoid and masseter masticatory muscles
T/F tissues of the pharyngeal arches 2-5 disappear and by overgrowing and smoothing the neck?
True
The 1st pharyngeal groove become the?
external auditory and and membrane deepens to become tempanic
