15 - Basics of Cartilage & Viscoelasticity 2

How are collagen fibers arranged in the transitional zone?

• parallel to the surface

• parallel to the tidemark

• perpendicular to the tidemark

• "randomly" crossing

How does collagen help support compressive cartilage loads?

• through interactions constraining proteoglycans

• by binding water

• compressive strength

• it doesn't help with compressive loads

How do proteoglycans help support compressive loads?

• compression strength from charge-charge repulsion

• by binding/restricting fluid flow

• through active molecular contraction

• they don't help support compressive loads

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