501. The maxillary processes:
A.Are covered with endoderm.
B.Are derived from the 1st branchial arch.
C.Form the primary palate.
D.Form the entire upper lip.

502. A unilateral cleft lip is formed when:
A.The palatal shelves remain in a vertical position.
B.The bucco-nasal membrane ruptures.
C.One maxillary process fails to fuse with the medial nasal process.
D.One lateral nasal process fails to fuse with the maxillary process.

503. The soft palate develops from:
A.Primary palate.
B.Palatal processes fused with the nasal septum.
C.Medial nasal process.
D.Palatal processes which are not fused with nasal septum.

504.Branchial archs sharing in tongue development are:
A. First & second.
B. First.
C. Second & third.
D. First, third & fourth.

505. The Stomodeum is lined by
A. Endoderm.
B. Mesoderm.
C. Ectoderm.
D. Endoderm & Mesoderm

506. The palatal shelves:
A.Develop from the lateral nasal processes.
B.From the primary palate.
C.Develop from the medial nasal processes.
D.Develop from the maxillary processes.

507. The ossification center of the developing mandible arise between:
A. inferior dental and lingual nerves.
B. mental and incisive nerves
C. mandibular and maxillary nerves.
D. superior alveolar and infra-orbital nerves.

508.The extrinsic muscles of the tongue are supplied by:
A.trigeminal nerve.
B.hypoglossal nerve.
C.facial nerve.
D. lingual nerve.

509. Secondary palate is developed from the :
A. 1st branchial arch .
B.2nd branchial arch.
C. 3rd branchial arch.
D.fronto-nasal process.

510.The muscles of mastication are derived from:
A. occipital myotomes.
B. 3rd branchial arch.
C. 1st branchial arch.
D. 2nd branchial arch.]

NOTE
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