Cellular Structure of Bone in the Muscular-Skeletal System

The video tutorial explains the cellular structure of bone, focusing on the bone matrix and the cells involved in its formation. It details the organic and inorganic components of the bone matrix, highlighting the roles of osteoid and hydroxyapatite. The tutorial also covers the four types of bone cells: osteoprogenitor cells, osteoblasts, osteocytes, and osteoclasts, explaining their functions and interactions in bone formation and resorption.

What are the two main components of the bone matrix?

• Proteins and water

• Osteoid and hydroxyapatite

• Osteocytes and osteoclasts

• Collagen and calcium

What type of collagen is primarily found in the organic portion of the bone matrix?

• Type 3 collagen

• Type 4 collagen

• Type 2 collagen

• Type 1 collagen

What is the chemical composition of hydroxyapatite?

• Sodium chloride crystals

• Magnesium phosphate crystals

• Calcium carbonate crystals

• Calcium phosphate crystals

Which cell type is the precursor to osteoblasts?

• Osteoprogenitor cells

• Osteocytes

• Osteoclasts

• Chondrocytes

Tags

NGSS.HS-LS1-4

What enzyme do osteoblasts produce to form the mineral portion of bone?

• Lactase

• Collagenase

• Tartrate-resistant acid phosphatase

• Alkaline phosphatase

What do osteocytes use to communicate with other cells?

• Little arms or branches

• Chemical signals

• Electrical impulses

• Hormones

What is the function of osteoclasts?

• Bone formation

• Protein production

• Bone resorption

• Collagen synthesis

What enzyme do osteoclasts use to break down bone?

• Lactase

• Collagenase

• Alkaline phosphatase

• Tartrate-resistant acid phosphatase

What are the empty spaces within bone called?

• Trabeculae

• Canaliculi

• Lacunae

• Osteons

What is the main role of osteoblasts in bone remodeling?

• Breaking down bone

• Building bone

• Transporting nutrients

• Maintaining bone