1. The trigeminal nerve gives three branches which is the ophthalmic, maxillary and mandibular branch.
2. Dorsal portion of the first pharyngeal
arch which makes up the maxillary
process contains Meckel’s cartilage.
3.
During the development, Meckel’s cartilage persist and form the incus
and malleus.
4.
Nerve supply for fourth and sixth pharyngeal arch is by vagus nerve.
5.
Muscles formed by third pharyngeal arch is the stylopharyngeus muscle.
6. Branchial fistulas occur when the third
pharyngeal arch fails to grow caudally.
7. The anterior two-third of the tongue is
formed by two lateral lingual swellings and one tuberculum impar.
8. Tongue musculature is innervated by
glossopharyngeal nerve.
9. Taste sensory innervations of the
anterior two-third is innervated by chorda tympani branch of facial nerve.
10.
Anterior two-third and posterior one-third of the tongue is separated by
arytenoids swellings.
11. Ankyloglossia (tongue-tie), is due to
the short frenulum attaching the tongue to the floor of mouth.
12. Second pharyngeal arch is also known as
hyoid arch.
13.
The IXth cranial nerve is the vagus nerve.
14. The first pharyngeal cleft enlarges to
form the external auditory meatus.
15. 3th , 4th and 5th
pharyngeal clefts form cervical sinus which later is obliterated.
16. The first pharyngeal pouch endoderm
enlarges adjacent to the first cleft to become the tubotympanic recess.
17. The third pair of pouches gives rise to
two diverticula, dorsal and ventral. From the dorsal part of the pouch arises
parathyroid III, which becomes the superior parathyroid gland.
18. All three embryonic layers are involved
in facial development.
19. Facial development is completed during
the twelfth week of prenatal development.
20. The stomodeum initially appears as a
shallow depression in the embryonic surface ectoderm at the cephalic end.
21. The paired maxillary processes fuse at
the midline to form the mandibular arch.
22. The paired medial nasal processes also
fuse internally and grow inferiorly on the inside of the stomodeum, forming the
intermaxillary segment.
23. The upper lip is formed when each
maxillary process fuses with each medial nasal process.
24. The intermaxillary segment gives rise
to the secondary palate.
25. The secondary palate will give rise to
the anterior third of the hard palate.
26. The nasal cavity forms at the same time
as the palate.
Ans:
1. T
10. F 19. T
2. F
11. T 20. T
3. T
12. T 21. F
4. T
13. F 22. T
5. T
14. T 23. T
6. F
15. F 24. F
7. T
16. T 25. F
8. F
17. F 26. T
9. T
18. T
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