791. Glenoid fossa is:
A. A depression on the inferior surface of the squamous part of the temporal bone.
B. An elevation on the inferior surface of the squamous part of the temporal bone.
C. A depression on the anterior surface of squamous part of the temporal bone.
D. An elevation on the inferior surface of the zygomatic part of the temporal bone.

792. The glenoid fossa is limited:
A. Medially by the spine of sphenoid & laterally by the root of the zygomatic process of the temporal bone.
B. Laterally by the spine of sphenoid &Medially by the root of the zygomatic process of the temporal bone.
C. Medially by the root of the zygomatic process of the temporal bone & laterally by the spine of sphenoid.
D. Medially by the spine of sphenoid & laterally by the squamous part of the temporal bone.

793. TMJ articular eminence is:
A. Present at birth.
B. Absent at birth.
C. Formed during birth.
D. Present at childhood.

794. TMJ disk is:
A. Biconcave of uneven thickness.
B. Concavo-convex of uneven thickness.
C. Biconcave of even thickness.
D. Concavo-convex of even thickness.

795. One of the following is not the exact function of TMJ ligament:
A. Prevent lateral displacement of one joint & medial displacement of the other.
B. Limit the amount of inferior displacement.
C. Prevents posterior displacement.
D. Restricts the TMJ displacement in all planes.

796. The TMJ large marrow spaces:
A. Remain unchanged.
B. Increases by age.
C. Decrease by age.
D. Rich in collagen type l

797. TMJ collagen fibers show alternating dark & light bands when viewed in polarized light which indicate that:
A. They are wavy or crimped.
B. They are straight.
C. They are twisted.
D. They are corrugated.

798. Condylar cartilage cells:
A. Increase in number with age.
B. Decrease in number with age.
C. Remain unchanged.
D. Degenerate with age.

799. The hyaline cartilage in the condyle serves as an active growth center till the age of:
A. 30 years.
B. 10 year.
C. 20 years.
D. 40 years.

800. The periodicity of the crimping seen in TMJ collagen fibers is of the order of:
A. 30-40 µm.
B. 15-20 µm.
C. 10-25 mm.
D. 15-30 mm.

NOTE
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