Understanding the Structure of a Long Bone

What is the primary function of long bones in the appendicular skeleton?

• To produce red blood cells

• To protect vital organs

• To store minerals

• To act as levers for movement

Which part of a long bone is referred to as the shaft?

• Epiphysis

• Metaphysis

• Diaphysis

• Periosteum

What is the role of articular cartilage in long bones?

• To provide structural strength

• To store fat

• To produce red blood cells

• To reduce friction in joints

What is the primary component of the periosteum?

• Red marrow

• Calcium

• Collagen

• Phosphorus

What fills the medullary cavity in most adult long bones?

• Red marrow

• Yellow marrow

• Spongy bone

• Compact bone

At what age does yellow marrow typically replace red marrow in the medullary cavity?

• 12-15 years

• 18-21 years

• 6-8 years

• 2-3 years

What type of bone is found in the metaphysis and epiphysis?

• Compact bone

• Spongy bone

• Cortical bone

• Hyaline cartilage

What is another name for spongy bone?

• Cortical bone

• Trabecular bone

• Compact bone

• Hyaline bone

What is the function of the epiphyseal plate in growing bones?

• To protect the bone

• To facilitate bone growth

• To produce red blood cells

• To store minerals

What happens to the epiphyseal plate when bone growth stops?

• It becomes an epiphyseal line

• It becomes a growth plate

• It turns into red marrow

• It remains unchanged