Bone Cells and Their Functions

Bone is a dynamic tissue undergoing constant remodeling through the actions of osteoclasts and osteoblasts. Osteoclasts, derived from monocytes, break down bone to release minerals, while osteoblasts build new bone tissue, forming osteoid and facilitating mineral crystallization. Bone serves as a mineral reservoir, crucial for calcium homeostasis. Bone mineral density (BMD) is a measure of bone strength and fracture risk. Embedded osteoblasts become osteocytes, contributing to bone's structural support and function.

What is the primary function of osteoclasts in bone tissue?

• To store calcium

• To break down and resorb bone tissue

• To build new bone tissue

• To produce collagen

From which type of cells are osteoclasts derived?

• Osteoblasts

• Chondrocytes

• Monocytes

• Fibroblasts

What role does bone tissue play in the body besides providing structural support?

• It stores fat

• It generates energy

• It produces red blood cells

• It acts as a calcium reservoir

Which cells are responsible for the formation of new bone tissue?

• Fibroblasts

• Osteoclasts

• Osteoblasts

• Chondrocytes

What is the organic component of bone produced by osteoblasts?

• Calcium phosphate

• Hydroxyapatite

• Osteoid

• Collagen

What is the major inorganic constituent of bone that contains calcium phosphate?

• Collagen

• Hydroxyapatite

• Osteoid

• Chondroitin sulfate

What does Bone Mineral Density (BMD) help estimate?

• The level of calcium in blood

• The number of osteocytes

• The risk of bone fracture

• The amount of collagen in bone

Into what do osteoblasts differentiate once embedded in the bone matrix?

• Osteoclasts

• Chondrocytes

• Fibroblasts

• Osteocytes