Cartilage Tensile Modulus Quiz

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Which of the following is NOT a factor that affects the tensile modulus (stiffness) of cartilage?

Density of collagen fibers

Type or amount of collagen cross linking

Orientation of collagen fibers

Articular cartilage's permeability under compression (correct)

As the density of collagen fibers in cartilage increases, the tensile modulus (stiffness) of the tissue will typically:

Decrease

Remain constant

Increase (correct)

Become more variable

How does the orientation of collagen fibers in cartilage affect the tensile modulus (stiffness) of the tissue?

Tensile modulus is independent of collagen fiber orientation

Tensile modulus varies inversely with the degree of fiber alignment

Fibers oriented perpendicular to the joint surface have higher tensile modulus

Fibers oriented parallel to the joint surface have higher tensile modulus (correct)

How does the degree of collagen cross-linking in cartilage affect its tensile modulus (stiffness)?

Increased cross-linking increases tensile modulus Signup and view all the answers

How does the permeability of articular cartilage change with increasing compressive strain and pressure?

Permeability decreases exponentially Signup and view all the answers

Which of the following factors can cause variations in the tensile modulus (stiffness) of articular cartilage?

All of the above Signup and view all the answers

What is the primary factor that governs the normal swelling behavior of articular cartilage?

Maintenance of the collagen-proteoglycan network integrity Signup and view all the answers

What is the primary cause of the viscoelastic behavior of articular cartilage?

All of the above Signup and view all the answers

What is the relationship between the hydraulic permeability 'k' and the creep behavior of cartilage in a confined compression test?

Creep is controlled by the exudation of fluid through the porous platen, and the movement of fluid is controlled by the hydraulic permeability 'k' Signup and view all the answers

How does the collagen-proteoglycan network integrity affect the hydration of articular cartilage?

Healthy cartilage with intact collagen-proteoglycan network shows less than 3% weight change, while degenerate cartilage shows significantly greater (~30%) weight change Signup and view all the answers

How does the orientation of the collagen fibers in articular cartilage affect its mechanical properties?

The text does not provide any information about the relationship between collagen fiber orientation and the mechanical properties of articular cartilage Signup and view all the answers

How does the degree of cross-linking in the collagen fibers affect the tensile modulus of articular cartilage?

The text does not provide any information about the relationship between collagen cross-linking and the tensile modulus of articular cartilage Signup and view all the answers

Which region of the tensile force-deformation curve for cartilage corresponds to the straightening and un-crimping of collagen fibrils?

The toe region Signup and view all the answers

In the linear region of the tensile force-deformation curve for cartilage, what is the behavior of the collagen fibrils?

The collagen fibrils are aligned parallel to the axis of tension Signup and view all the answers

Which of the following factors contributes to the anisotropic mechanical behavior of cartilage?

Inhomogeneous distribution of collagen fibrils and proteoglycans Signup and view all the answers

Under compressive loading, which of the following mechanisms contributes to the resistance of cartilage to compression?

The osmotic swelling pressure increases, and the resistance to compression is achieved Signup and view all the answers

Which of the following statements is true regarding the tensile modulus of cartilage?

The tensile modulus is higher in regions with higher collagen fibril density Signup and view all the answers

Which of the following factors contributes to the high compressive stiffness of cartilage?

The presence of a high concentration of fixed negative charges on the proteoglycans Signup and view all the answers

Cartilage Tensile Modulus Quiz

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