Lamellar and Compact Bone Structure Quiz

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What defines the outer border of osteons in compact bone?

Trabeculae

Haversian canals

Mineralized collagen fibers

Cement lines (correct)

Which type of bone is characterized by parallel layers of lamellae with mineralized collagen fibers that are parallel within each lamella?

Trabecular bone

Cortical bone

Woven bone

Lamellar bone (correct)

What is the primary source of nutrition for compact bone?

Intraosseous circulation (correct)

Cement lines

Haversian canals

Trabeculae

In which type of bone does collagen arrangement tend to be more irregular and isotropic in terms of mechanical properties?

Woven bone Signup and view all the answers

What property of compact bone makes it better able to resist torsion and bending compared to cancellous bone?

Higher mineralization Signup and view all the answers

Which type of bone has more or less randomly arranged fibers, is quickly formed, and is weaker than mineralized bone?

Woven bone Signup and view all the answers

According to Wolff's Law, what is the primary mechanism by which bone remodels in response to the stresses applied to it?

Bone is laid down along the lines of stress, increasing bone thickness and density Signup and view all the answers

Which of the following is a key difference between cortical (compact) bone and cancellous (trabecular/spongy) bone?

Cancellous bone has a much larger surface area than cortical bone Signup and view all the answers

What is the primary function of the Haversian systems (osteons) in the microstructure of cortical bone?

To allow for the penetration of blood vessels and nerves into the dense cortical bone Signup and view all the answers

What is the primary component of the organic matrix of bone?

Collagen fibers Signup and view all the answers

What is the primary mechanism by which bone density is regulated in the adult skeleton?

The balance between bone formation by osteoblasts and bone resorption by osteoclasts Signup and view all the answers

Which of the following is a key characteristic of the microstructure of cancellous (trabecular/spongy) bone?

It has a more porous, sponge-like structure with a higher degree of remodeling Signup and view all the answers

Which of the following statements about cortical bone is correct?

It is most brittle under tensile forces in the transverse direction. Signup and view all the answers

Which of the following statements about trabecular bone is correct?

It can absorb considerable energy while maintaining a minimum mass. Signup and view all the answers

What happens to the stress distribution in a bone under bending load?

The stress is lower near the neutral axis and higher farther away. Signup and view all the answers

Which of the following statements about the effect of loading rate on bone is correct?

Increased loading rate increases stiffness and influences the fracture pattern and soft tissue damage. Signup and view all the answers

What is the effect of reduced load on bone?

Immobilization for 60 days reduces bone mass by 1% per week. Signup and view all the answers

How does exercise affect growing bone?

Low or moderate exercise causes a significant addition of new cortical and trabecular bone, usually through periosteal expansion. Signup and view all the answers