821. In a slide showing spongy bone formed solely by intramembranous ossification, all of thefollowing features may be found upon microscopic examination except
A. non-lamellar bone
B. osteoclasts
C. lamellar bone
D. calcified cartilage
E. periosteum

822. Demineralized bone consists chiefly of
A. sialic acid and other mucopolysaccharides
B. osteoid
C. amorphous hydroxyapatite
D. canaliculi and lacunae
E. collagen

823. The formation of bone in the absence of a pre-existing cartilage framework is called
A. Nonlamellar
B. lamellar
C. Intramembranous
D. intercartilaginous
E. endochondral

824. Which one of the following is a correct statement concerning Haversian systems(osteons)?
A. are found in fetal skeletons
B. are found in spongy bone
C. develop around Volkman’s canals
D. develop around a blood vessel
E. are most common during rapid growth of adolescence

825. Osteoclasts arise from
A. osteocytes
B. Osteoblasts
C. osteoclasts
D. monocytes
E. osteoprogenitor cells

826. Osteocytes arise most directly from
A. chondrocytes
B. Osteoblasts
C. osteoclasts
D. monocytes
E. osteoprogenitor cells

827. Fibrocartilage is characterized at the light microscopic level by
A. basophilia
B. elastic fibers
C. Perichondrium
D. collagen(ic) fibers
E. mineralized matrix

828. The microscopic structure of certain parts of the temporomandibular joint differs fromcorresponding parts of most other articulations of the human body. One suchdifference is that the articulating surfaces of the TMJ are
A. bone
B. elastic cartilage
C. vascular
D. fibrous tissue
E. hyaline cartilage

829. In which of the following regions of the temporomandibular joint would you most expectto find phagocytes?
A. synovial membrane
B. central region of meniscus
C. joint capsule
D. articular tissue
E. synovial cavity

830. The periodontal ligament is composed chiefly of
A. reticular fibers
B. microfibrils
C. collagen(ic) fibers
D. oxytalan fibers
E. elastic fibers

NOTE
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