15 - Basics of Cartilage & Viscoelasticity

Which is NOT true of articular cartilage?

• 70-85% of weight is water

• the main type of collagen is type I

• small number of chondrocytes

• dry weight primarily type II collagen and proteoglycans

Which is NOT a zone of articular cartilage?

• superficial-tangential

• calcified layer

• deep zone

• subchondral bone

Collagen is best at resisting which type of load?

• compression

• shear

• tension

• torsion

Proteoglycan is best at resisting which type of load?

• compression

• shear

• tension

• torsion

A solid material slowly deforming under a constant load exhibits a...

• creep response

• viscous response

• stress-relaxation response

• unpredictable response

A material held at constant length/strain that has a decrease in stress magnitude exhibits...

• creep response

• viscous response

• stress-relaxation response

• unpredictable response

Viscoelastic behavior depends on all of the following EXCEPT:

• amount of time the strain is applied

• the time of day when the test is performed

• previous condition of the material

• rate at which the strain is applied