Functions of Osteoblasts & Osteocytes | Organization of the Osteon

The video tutorial explains the types of bone cells, focusing on osteoblasts and osteocytes. Osteoblasts secrete bone matrix, composed of collagen and hydroxyapatite, which hardens to form bone. As osteoblasts become trapped in the matrix, they differentiate into osteocytes, which maintain bone tissue. The structure of the osteon, the functional unit of compact bone, is detailed, highlighting the central canal, concentric lamellae, and the role of canaliculi in cell communication. Microscopic images illustrate these concepts, providing a comprehensive understanding of bone tissue organization.

What is the primary function of osteoblasts in bone tissue?

• To secrete bone matrix

• To maintain bone tissue

• To break down bone matrix

• To transport nutrients

Which component of the bone matrix provides flexibility?

• Osteocytes

• Collagen proteins

• Calcium salts

• Hydroxyapatite

What triggers the transformation of osteoblasts into osteocytes?

• High collagen production

• Increased bone density

• Low oxygen and glucose delivery

• Excessive nutrient supply

What is the main role of osteocytes in bone tissue?

• Transporting blood

• Breaking down bone

• Maintaining bone tissue

• Secreting bone matrix

Where do osteocytes reside within the bone structure?

• Perforating canals

• Central canal

• Concentric lamellae

• Lacunae

What is the central canal in an osteon also known as?

• Canaliculi

• Lamellae

• Lacuna

• Haversian canal

What surrounds the central canal in an osteon?

• Lacunae

• Interstitial lamellae

• Perforating canals

• Concentric lamellae

What is the function of canaliculi in bone tissue?

• To supply blood to osteocytes

• To secrete bone matrix

• To connect osteocytes for communication

• To store calcium

How do osteocytes communicate with each other?

• Through blood vessels

• Via arm-like projections in canaliculi

• Through the central canal

• By secreting hormones

What connects adjacent osteons to ensure blood supply?

• Concentric lamellae

• Central canals

• Perforating canals

• Lacunae