QCM : Muscle and Tendon Biomechanics — 9 questions

Explication

Tendons are mainly composed of collagen type I fibrils, which form fibers and bundles that provide high tensile strength necessary for transmitting force from muscles to bones. This organized collagen structure is essential for their function.

Explication

Collagen type I is the main structural protein in tendons, forming fibrils that give tendons their tensile strength. Elastin is more elastic and found in elastic tissues, not primarily in tendons.

Explication

Tendons are inelastic structures with low elasticity. Overstretching beyond their elastic limit can cause partial or complete rupture, which is why they are susceptible to injury if overstressed.

Explication

Fibrils are assembled from collagen molecules and are the primary structural elements that provide tensile strength, organized into fibers and bundles for functional strength.

Explication

The organized collagen structure in tendons, including fibrils, fibers, and bundles, provides high tensile strength and enables efficient force transmission from contracting muscles to bones, facilitating movement.

Explication

Tendons are inelastic tissues that transmit force from muscle to bone, whereas ligaments are more elastic and connect bones to stabilize joints.

Explication

Elastin fibers are not part of the collagen hierarchy; the hierarchy includes fibrils, fibers, and bundles, all composed mainly of collagen.

Explication

Overstretching tendons beyond their elastic limit can cause rupture of collagen fibers, risking injury and compromising tensile strength.

Explication

Cartilage is more flexible and compressible, serving as a smooth surface for joints, whereas tendons are primarily tensile structures connecting muscle to bone.