PNS and Pharyngeal Development Questions And Answers | Latest Update
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PNS and Pharyngeal Development
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PNS And Pharyngeal Development
PNS and Pharyngeal Development Questions And Answers | Latest Update
1. The secondary palate is formed from the:
A) Maxilla
B) Mandible
C) Lateral palatine processes
D) Incisive papilla
Answer: C) Lateral palatine processes________________________________________
2. Which pharyngeal arch is ...
PNS and Pharyngeal Development Questions And
Answers | Latest Update
1. The secondary palate is formed from the:
A) Maxilla
B) Mandible
C) Lateral palatine processes
D) Incisive papilla
Answer: C) Lateral palatine processes
2. Which pharyngeal arch is responsible for the formation of the maxilla and mandible?
A) First arch
B) Second arch
C) Third arch
D) Fourth arch
Answer: A) First arch
3. What structure develops from the fusion of the endoderm of the pharyngeal pouches and the
ectoderm of the pharyngeal grooves?
A) Larynx
B) Thyroid gland
C) Pharyngeal membrane
D) Trachea
Answer: C) Pharyngeal membrane
4. Which of the following components of the peripheral nervous system is derived from neural
crest cells?
A) Dorsal root ganglia
B) Spinal cord
C) Brainstem
D) Cerebellum
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Answer: A) Dorsal root ganglia
5. The secondary palate arises from the lateral palatine processes (shelves) of the
________________.
A) Mandible
B) Maxilla
C) First arch
D) Second arch
Answer: B) Maxilla
6. The auricle of the external ear develops from:
A) First and second pharyngeal arches
B) First pharyngeal arch only
C) Third pharyngeal arch
D) Fourth pharyngeal arch
Answer: A) First and second pharyngeal arches
7. The axons of sympathetic preganglionic neurons that enter the sympathetic trunk ganglia can do
the following, EXCEPT:
A) Synapse with postganglionic neurons
B) Ascend or descend the trunk
C) Pass through without synapsing
D) Enter the dorsal root
Answer: D) Enter the dorsal root
8. The lateral palatine processes initially grow downward toward the future floor of the mouth.
This is caused by the presence of the:
A) Tongue
B) Mandible
C) Maxilla
D) Pharynx
Answer: A) Tongue
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9. What anatomical structure is formed at the junction of the anterior two-thirds and posterior one-
third of the tongue during development?
A) Foramen cecum
B) Sulcus terminalis
C) Lingual frenulum
D) Papillae
Answer: B) Sulcus terminalis
10. In regards to the pharyngotympanic tube, which of the following statements is true?
A) It connects the throat to the middle ear
B) It is entirely derived from the second pharyngeal arch
C) It closes completely at birth
D) It is involved in taste sensation
Answer: A) It connects the throat to the middle ear
11. Which type of cells are responsible for the formation of mesenchyme in the pharyngeal arches
during development?
A) Ectodermal cells
B) Endodermal cells
C) Mesodermal cells
D) Neural crest cells
Answer: D) Neural crest cells
12. Intrinsic muscles of the larynx are derived from:
A) First pharyngeal arch
B) Second pharyngeal arch
C) Fourth and sixth pharyngeal arches
D) Third pharyngeal arch
Answer: C) Fourth and sixth pharyngeal arches
13. Cleft lip and palate most commonly occur in:
A) Females
B) Males
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