Understanding Bone Structure and Function

What is the main component that makes up the skeleton?

• Bones

• Cartilage

• Muscles

• Ligaments

What are the two types of cells involved in bone remodeling?

• Osteoblasts and Osteoclasts

• Chondrocytes and Osteocytes

• Fibroblasts and Myocytes

• Adipocytes and Osteocytes

What is Osteoporosis?

• Weak bones

• Strong bones

• Healthy bones

• Flexible bones

What is the major organic fraction of solid bone?

• Collagen

• Calcium

• Phosphorus

• Magnesium

What is the density of bone?

• 1.9 gm/cm2

• 2.5 gm/cm2

• 1.0 gm/cm2

• 3.0 gm/cm2

What is the stress at which compact bone breaks?

• 170 × 106 N/m2

• 120 × 106 N/m2

• 100 × 106 N/m2

• 150 × 106 N/m2

What is the formula for calculating stress?

• Stress = Force / Area

• Stress = Area / Force

• Stress = Mass / Volume

• Stress = Volume / Mass

What happens to the length of a bone under tension?

• It increases

• It decreases

• It remains the same

• It breaks

What is the main function of synovial fluid in joints?

• Lubrication

• Protection

• Support

• Movement

What is the coefficient of friction for healthy joints?

• Less than 0.01

• 0.1

• 0.5

• 1.0