Practice Questions

Correct: Most embryonic bones develop from cartilage through endochondral ossification. A: Bone is harder than cartilage. C: Cartilage contains fewer mineral salts. D: Most cartilage is replaced by bone before adulthood. Concept: Embryonic skeletal development and ossification.

Correct: Collagen provides tensile strength and flexibility. Without it, bone becomes brittle. A: Rigidity depends mainly on minerals. C: Minerals are stored in the matrix. D: Osteons are structural units, not formed by collagen alone. Concept: Organic matrix of bone.

Correct: Both tissues are connective tissues with cells embedded in a matrix. A: Only bone has Haversian canals. B: Cartilage is avascular. D: Elastic fibers are mainly found in elastic cartilage. Concept: Comparison of connective tissues.

Correct: Bone contains abundant calcium salts that provide rigidity. A: Both tissues contain collagen. C: Osteocytes are bone cells. D: Cartilage has a well-developed matrix. Concept: Mechanical properties of bone and cartilage.

Correct: Osteoclasts resorb bone; excessive activity weakens bones. A: Bone density decreases. C: Osteoclasts do not form cartilage. D: Muscle strength is unrelated. Concept: Bone remodeling.

Correct: Loss of articular cartilage increases friction, causing pain and restricted movement. A: Bone marrow production is unrelated. C: Calcium storage is unaffected. D: Bone flexibility does not increase. Concept: Function of articular cartilage.

Correct: Compact bone consists of osteons with concentric lamellae around Haversian canals. A, B & D: Cartilage lacks osteons and Haversian canals. Concept: Histology of compact bone.

Correct: The periosteum contains osteoblasts responsible for appositional growth and fracture repair. A: Blood cells are produced in bone marrow. C: Mineral storage continues in existing bone. D: Protection remains unless bone is damaged. Concept: Role of periosteum.

Correct: Chondrin gives cartilage resilience and flexibility for shock absorption. A: Mineralization makes bone rigid. C: Osteons are bone structures. D: Cartilage is avascular. Concept: Structure-function relationship of cartilage.

Correct: Osteoblasts beneath the periosteum deposit new bone on the outer surface, increasing bone thickness. A: Chondrocytes increase bone length. C: Osteoclasts resorb bone. D: Osteocytes mainly maintain bone tissue. Concept: Appositional growth of bone.