Which elements are derived from neural crest? head mesenchyme hyoid bone C-cells or parafollicular cells of the thyroid thyroid cartilage all of the above are correct
The laryngeal cartilages develop from branchial arches IV and VI. true false
The parathyroid glands are derivatives of pharyngeal pouches III and IV. true false
The hypobranchial eminence contributes to formation of: anterior portion of the tongue posterior portion of the tongue musculature of the tongue epiglottis palatine tonsil
The fact that general and special sensory information from the posterior part of the tongue is carried by glossopharyngeal nerve indicates that this part of tongue is from branchial arch ____. I II III IV VI
Myoblasts from the occipital myotomes are believed to give rise to the muscles of the: eye face ear jaw, for mastication tongue
As a resident in pediatrics, you are called to see a newborn who has a unilateral cleft lip and a unilateral cleft of the primary palate. This condition is most likely the result of: failure of fusion of the mandibular
prominences failure of fusion of the medial nasal processes failure of fusion of the maxillary prominence
with the medial nasal prominence failure of fusion of the lateral palatine
processes with the nasal septum failure of fusion of the paired lateral palatine
processes
Which of the following structures is NOT part of the first branchial arch? malleus mandibular process sphenomandibular ligament stylohyoid ligament maxillary process
Which of the following structures is NOT part of the 2nd branchial arch? stapes superior portion of body of hyoid bone sphenomandibular ligament stylohyoid ligament lesser cornu of the hyoid bone
Which structures are derived from the intermaxillary segment of the embryonic face? philtrum anterior portion of the palate anterior portion of the upper jaws upper incisor teeth all of the above are correct
The nasolacrimal groove separates the: mandibular and maxillary swellings lateral nasal swelling and maxillary swelling medial nasal swelling and maxillary swelling first and second branchial arches otic and optic vesicles
Which of the following does NOT form from the thyroglossal duct? pyramidal lobe of the thyroid ectopic thyroid tissue thyroglossal cyst branchial fistula
The secondary palate is formed by: fusion of palatal shelves posterior growth of the primary palate mesenchyme of the first arch cell death in the region of the oropharyngeal
membrane more than one of the above
The branchial, visceral, or pharyngeal arches are derived from: ectoderm endoderm both neither
Many facial malformations are believed to be due to: a failure of the oral membrane to rupture a failure of neural crest cells to migrate into
the facial processes a failure in growth of the head fold an abnormal persistence of the pharyngeal
clefts none of the above
The foramen cecum of the adult tongue: marks the point of embryonic evagination of
the thymus gland divides the tongue into two parts, an
anterior one-third and a posterior two-thirds marks the point of embryonic evagination of
the thyroid gland develops into taste buds has no embryologic significance
Identify the correct associations: primary palate - palatine shelves of maxillary
processes neural crest cells - facial processes nasolacrimal groove - lateral nasal process
and mandibular process cleft lip - medial & lateral nasal processes
The pharyngeal arches are associated with each of the following EXCEPT : cartilaginous structures cranial nerves venous arches vascular components muscular components
Which of the following malformations is NOT found in the "first pharyngeal arch syndrome"? abnormal external ear abnormal middle ear macrostomia thyroglossal duct cyst defect in lower eye lid
The intermaxillary segment of the embryonic face gives rise to the philtrum of the upper lip, part of the maxilla with four incisor teeth and the triangular primary palate. true false
Cleft palate results when the palatine shelves fail to fuse with the nasal septum. true false
A syndrome involving a lack of pharyngeal pouch III would result in a lack of the thymus gland and palatine tonsil. true false
Each pharyngeal arch includes: derivatives of ectodermal neural crest cells an aortic arch artery a mesodermal core from paraxial mesoderm a cranial nerve all of the above
Which of the following are associated with the 2nd pharyngeal arch? the malleus bone facial nerve glossopharyngeal muscle the lower portion of the hyoid bone anterior belly of digastric
025 Identify the correct associations: external ear abnormality - mandibular and
maxillary processes oblique facial cleft - frontal and maxillary
processes cleft lip - maxillary & medial nasal processes macrostomia - mandibular and hyoid arches aglossia - mandibular arch
Which of the following are associated with the 3rd pharyngeal pouch? parafollicular or calcitonin cells of the thyroid
gland superior parathyroid gland thyroid gland thymus gland
Branchial cysts or lateral cervical cysts: are found along the anterior border of the
sternocleidomastoid muscle are formed from a rupture of the membrane
between pharyngeal pouches and branchial
clefts are remnants of the thyroglossal duct are found in front of the ear
An absent lower jaw is called: micrognathus cleft lip macrostomus cheiloschisis agnathus
In the process of face formation or construction, the first to come into being is the: orbital ridge upper jaw lower jaw ears nose
Auditory ossicles develop from the condensed mesenchyme of the: third branchial arch fourth branchial arch both neither
The third branchial arch cartilage gives rise to the: stylohyoid ligament thyroid cartilage styloid process greater cornu of the hyoid bone sphenomandibular ligament
A small blind pit at the anterior border of the sternocleidomastoid muscle that drips mucus is likely the persistence of the embryonic opening of the: first pharyngeal pouch third pharyngeal pouch second branchial groove second branchial groove and cervical sinus thyroglossal duct
Which of the following develops from the connective tissue component of the second pharyngeal arch? thyroglossal duct malleus tympanic membrane laryngeal muscles mylohyoid muscle palatine tonsil lesser horn of hyoid bone superior parathyroid gland stylopharyngeus muscle nasolacrimal duct cricoid cartilage external auditory meatus
Which of the following develops from the first pharyngeal cleft? thyroglossal duct malleus tympanic membrane laryngeal muscles mylohyoid muscle palatine tonsil lesser horn of hyoid bone superior parathyroid gland stylopharyngeus muscle nasolacrimal duct cricoid cartilage external auditory meatus
Which of the following develops from the third pharyngeal arch? thyroglossal duct malleus tympanic membrane laryngeal muscles mylohyoid muscle palatine tonsil lesser horn of hyoid bone superior parathyroid gland stylopharyngeus muscle nasolacrimal duct cricoid cartilage external auditory meatus