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Chapter 7: Cartilage

The molecular basis for the shock absorbing properties of cartilage involves which of the following?

a. Electrostatic interaction of proteoglycans with type IV collagen

b. Ability of glycosaminoglycans to bind anions

c. Noncovalent binding of glycosaminoglycans to protein cores

d. Sialic acid residues in the glycoproteins

e. Hydration of glycosaminoglycans

What distinguishes cartilage from most other connective tissues?

a. Its extracellular matrix is rich in collagen.

b. Its predominant cell type is a mesenchymal derivative.

c. Its predominant cell type secretes both fibers and proteoglycans.

d. It lacks blood vessels.

e. It functions in mechanical support.

Which feature is typical of elastic cartilage?

a. Primary skeletal tissue in the fetus

b. No identifiable perichondrium

c. Found in intervertebral discs

d. Most widely distributed cartilage type in the body

e. Collagen is mainly type II

Which area in cartilage is relatively collagen-poor and proteoglycan-rich?

a. Fibrocartilage

b. Territorial matrix

c. Epiphyseal plate

d. Interterritorial matrix

e. Perichondrium

What is the source of the mesenchymal progenitor cells activated for the repair of hyaline cartilage of accident-damaged costal cartilages?

a. Perichondrium

b. Adjacent loose connective tissue

c. Bone of the adjacent rib(s) and sternum

d. Chondrocytes of the injured cartilage

e. Stem cells circulating with blood

How does articular cartilage differ from most other hyaline cartilage?

a. It undergoes mainly appositional growth.

b. It contains isogenous groups of chondrocytes.

c. It lacks a perichondrium.

d. Its matrix contains aggrecan.

e. It is derived from ...

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